So, to make sure I understand your question,
You have two tax deferred accounts you want to use to fund some of your investment in a project. And you want the investment to remain tax deferred.
I think I can suggest a way: A self-directed 401(k) or IRA. It's set up with a trustee, there is a small admin fee annually, but you don't appear to disqualify from any of the requirements for self-dealing and the like.
The entity taxes rollover funds from your other accounts, tax free trustee-to-trustee. The self-directed IRA or 401(k) then cuts the check and takes the investment interest
, as an LP interest, LLC
or other fractional share.
I did not check the rules
to see if your existing investment disqualifies you from adding self-directed retirement
funds as well, but I think that's a good start toward your solution.
Thanks for asking at just Answer. Please advise if you need follow up. I'm PDtax.