We were a very unique situation (self-employee spouses, HELOC on the existing home, yada yada), and Jason worked his butt off to pull everything together.

It means that not only is it rare, it’s unique and genuine.

As the buyer, you will repay any pre-paid city taxes the seller already made, pre-pay insurance, pay any transfer fees or taxes to the city or state, appraisal, title services and insurance, recording fees, transfer taxes, and any loan charges.Seller pays concessions for repairs, rent prorations, security deposits, any property taxes past due to date of closing, any required inspections such as fire inspections, and any final utility bills.

Please be sure to select a Solo 401k plan provider which allows you to take a loan and will prepare the required 401k loan documents.The repayment terms are equal monthly/quarterly payments (as you prefer) of principal and interest (e.g. prime + 1%) spread over a 5 year term (or longer if you will use the loan to purchase your primary residence).There are no prepayment penalties and no restrictions on what you can do with the proceeds of the 401k loan.Please note that you are obligated to pay back their 401k (regardless of the performance of your real estate investment).As an alternative to taking the loan, you could even purchase the investment property directly using funds in your Solo 401k (assuming you select a Solo 401k plan provider which allows you to invest in real estate).

I understand there's a draw period and repayment period.

Probably yes if you have an electronic system where everyone has their own unique pass code.  

Note investing to me has been a unique opportunity to become a private lender but mitigating the risk of origination.

@Michael DownsYou are already using your attorney for the basic lease, so just think of anything unique to your house that could be an issue you want to address, and have your attorney add the proper wording to your lease to keep it legal.An example is several of my SFH have an alley behind the house.

The mortgage lender always reviews debt-to-income ratio when underwriting a borrower because the lender wants to ensure borrowers can repay the debt. 

Phoenix is in a really unique position right now.