I would roll over some of my old 401k to the solo401k to start the funding.I just dont know how the k-1 negative ordinary income would flow into the Schedule C and how the cap gains at the end would flow? 

As an alternative to taking a distribution from your 401k, consider the following:If you are self-employed (i.e. active self-employment earned income separate from your w-2 income) with no full-time w-2 employees, you can set up a Solo 401k and then rollover your 401k funds once you leave your current job.

Please see additional considerations below.If you are eligible to set up a self-employed Solo 401k (or have a 401k plan through an employer which accepts rollover contributions and allows for 401k participant loans), another alternative which would avoid taxes and penalties would be to transfer your funds to such a 401k plan and then take a 401k participant loan.

In that case, the plan won't allow you to invest in real estate (or even rollover contributions to another retirement plan that would until you quit your job).2) If the plan allows you to take a 401k loan, that might be one option to access funds to invest in real estate (i.e. you would borrow the funds and then purchase in your own name or an entity that you own personally).Here are the general considerations regarding 401k loans.401k Participant LoansIf your 401k plan allows for 401k participant loans, the maximum loan amount is equal to 50% of the balance up to $50k.

If not and you are self-employed with no employees you can set up a Solo 401k, and if you are eligible to rollover the funds (e.g. from a former employer plan or non-roth ira), you could rollover to a solo 401k plan that allows to take a 401k participant loan. 

Greetings,For the Thrift Savings Plan account holders, has anyone performed a rollover from their TSP to their HSA?

I have a 401k account from my previous employer which I need to roll over to something.

Greetings- question in regards to roll overs to C Corp.

I needed to find properties to roll over my proceeds using a 1031 exchange How did you find this deal and how did you negotiate it?

This would allow you to rollover your prior plan and start building some savings with high plan contribution limits.For now, open a Solo 401(k) with a low cost brokerage like Fidelity and put the investments in some low cost index funds.