You don't want any transaction with a retirement account to be deemed as a distribution if that wasn't the intent.

So I did another house hacking technique moving into one of my own homes that I would’ve made less money on renting it out, in comparison to where I was paying rent at.

You have to either pay yourself a salary or take shareholder distributions with any profits. 

@kelly Ikpeama same here on the multi-family and ccan't to use the brrrr technique!

Another technique is to use transaction financing to purchase it and immediately resell it.

@Ron Alexander For distribution, you can have one or more per LLC, and that depends on multiple factors:- property class - you might not want to mix A class property with a D class property in the same LLC, due to different tenant level- cash flow - you might want to keep your cash flow cow separate (and alone) from the ones that barely produce (and can be combined in one LLC till they start "producing")- equity - you might want to keep the one with large equity in its own LLC while you can group the ones with little equity in another LLC (let's say you have one with 50K equity in its own LLC and 3 other each with only 10K in another LLC, till their equity grows to your risk threshold when you move them out in their own LLC).- number of units (in the case of MF)- location of real estateThe investor has to decide what mix is optimal for their situation.If Series-LLC is an option for you, get one and put each property in its own child Series-LLC, problem solved.

(This is not legal advice nor am I an attorney but I was involved in my own probate matter which reached Final Distribution and settled the estate)

@Rupert GrantFollowing are the similarities and differences between the solo 401k and the self-directed IRA.The Self-Directed IRA and Solo 401k SimilaritiesBoth 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; andBoth 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 (checkbook IRA) 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 2018, the solo 401k contribution limit is $55,000, 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.)

The funds are distributed in advance so essentially it's like the States have a piggy bank of Federal funds to pay the tenant's rents.

@Tina JenkinsUnless you meet a distribution triggering event, you may not be able to transfer that 401k,  Here are some examples of triggering events:Reaching retirement age.