Additionally, keep in mind you can do only one rollover in any 12-month period per tax payer, regardless of how many IRAs you may have.  

@Mike KeenanFollowing are the similarities and differences between the solo 401k and the self-directed IRA.The Self-Directed IRA and Solo 401k Similarities Both were created by congress for individuals to save for retirement;Both may be invested in alternative investments such as real estate, precious metals tax liens, promissory notes, private company shares, and stocks and mutual funds, to name a few;Both allow for Roth contributions;Both are subject to prohibited transaction rules;Both are subject to federal taxes at time of distribution;Both allow for checkbook control for placing alternative investments;Both may be invested in annuities;Both are protected from creditors;Both allow for nondeductible contributions;Both are prohibited from investing in assets listed under I.R.C. 408(m).The Self-Directed IRA and Solo 401k DifferencesIn order to open a solo 401k, self-employment, whether on a part-time or full-time basis, is required;To open a self-directed IRA, self-employment income is not required;In order to gain IRA checkbook control over the self-directed IRA funds, a limited liability company (IRA LLC) must be utilized;The solo 401k allows for checkbook control from the onset;The solo 401k allows for personal loan known as a solo 401k loan;It is prohibited to borrow from your IRA;The Solo 401k may be invested in life insurance;The self-directed IRA may not be invested in life insurance;The solo 401k allow for high contribution amounts (for 2016; the solo 401k contribution limit is $53,000, whereas the self-directed IRA contribution limit is $5,500);The solo 401k business owner can serve as trustee of the solo 401k;The self-directed IRA participant/owner may not serve as trustee or custodian of her IRA; instead, a trust company or bank institution is required;When distributions commence from the solo 401k a mandatory 20% of federal taxes must be withheld from each distribution and submitted electronically to the IRS by the 15th of the month following the date of each distribution;Rollovers and/or transfers from IRAs or qualified plans (e.g., former employer 401k) to a solo 401k are not reported on Form 5498, but rather on Form 5500-EZ, but only if the air market value of the solo 401k exceeds $250K as of the end of the plan year (generally 12/31);When funds are rolled over or transferred from an IRA or 401k to a self-directed IRA, the amount deposited into the self-directed IRA is reported on Form 5498 by the receiving self-directed IRA custodian by May of the year following the rollover/transfer.Rollovers (provided the 60 day rollover window is satisfied) from an IRA to a Solo 401k or self-directed IRA are reported on lines 15a and 15b of Form 1040;Pre-tax IRA contributions on reported on line 32 of Form 1040;Pre-tax solo 401k contributions are reported on line 28 of Form 1040;Roth solo 401k funds are subject to RMDs;A Roth 401k may be transferred to a Roth IRA (Note that from a planning perspective, it may be advantageous to transfer Roth Solo 401k funds to a Roth IRA before turning age 70 ½ in order to escape the Roth RMD requirement applicable to Roth 401k contributions including Roth Solo 401k contributions and earnings.)

You casually remind them that their pet tarantula escaping from its cage is actually not considered an emergency according to their lease agreement and that they can contact you again during business hours to address it, but that they would be billed for this as it is not an owner covered expense under the lease agreement, and then you roll over and go back to bed and more than likely they don't call you back about the issue and it magically goes away. :-)

So I finally have enough in my roth IRA to possibly get involved in a flip but wanted to run it by your pro's before talking to my CPA/attorney to see if this is kosher.I have ~40k in my roth that I plan to roll over into Quests' SD IRA.Ive identified a property with a purchase price of 80k.

Please note that you are obligated to pay back their 401k (regardless of the performance of your real estate investment).Per the loan offset rules that went into effect with the 2018 Tax and Job Act: if you leave your job and the loan is current at the time you leave your job but then the loan goes into default because you left your job, you will have until your tax return deadline (including any timely filed extension) to make the loan current by depositing the outstanding balance into an IRA (and thereby avoid the taxes and penalties that would otherwise apply).If you are self-employed with no full-time employees & you can rollover the funds, you could set up a Solo 401k, rollover the funds and take a 401k loan from the Solo 401k.

You may avoid the taxes if you deposit the funds in an eligible retirement plan (which includes an IRA) within "3 years and a day" of the date of the COVID-19 distribution (note: compare to a 60-day rollover).

I want to be able to rollover a portion of my current employer's 401K into an IRA account, but all of the FAQ's I have read seem like a Roth IRA is the way to go if I want it to be tax free.

My plan is pretty much what you said roll over profits and give a bit of profit to family for willing to invest with and in me.

Coming up we plan to make the basement a more enjoyable place to do laundry (currently a dungeon) and eventually performing similar work on the upstairs unit once we roll-over tenants (inherited long-term tenants on a 2-year lease). 

The general way it works is that you and your wife would each rollover your 401(k) and 403(b) to a self directed IRA, then your IRA would make the investment.