I plan to offer owner financing to others that can't get a loan.

I would suggest reaching out to owners of multi family who have no loan on the property.

Quote from @Jaycee Greene: Assuming you pay asking price, I'd estimate the down payment for something like that using a hard money loan (HML) would be around 40% of the purchase price and your monthly payment would be $2,600 with an interest rate in the low 7% range (probably need a 700+ credit score to get that).

A non-recourse loan is an option if your SDIRA doesn't have enough funds.

We did that for about 3 years until Jeff informed me he'd fallen behind on property taxes, and all of his lenders called the loans due.

Just to name a few: Borrower's Experience FICO Loan Amount Loan Type being sought: Perm (30 yr ams), Bridge (12-36mo I/O), Rehab (12-36mo I/O), Ground Up (12-60mo I/O) Property Type (1-4 unit, 5+ MF, Warehouse/industrial, Hospitality etc)If you have a specific deal in mind, then you can have a lender (or broker) look at it and give you a better idea.

I use a loan servicer who processes the borrowers payment and then sends to me.

The expense tracker, reports and rental sheets (useful if you are planning to do the BRRRR method and need to calculate 2 different sets of loans).I used to have my own custom spreadsheets that I built but this one does everything mine did plus much more. 

I bought this property with a private interest free loan from a friend. the person i bought it from need cash fast so i offered them a low cash offer and they accepted.I had enough money saved up to rehab the house with my savings.

Cash out should be used as a 12-24 month loan so that you can buy another property and pull cash out at the next 12th or 24th month mark.At that point you take a portion to pay off or down the first loan and use the rest as a down payment on the next REI.