And will you be utilizing property management firms to help out? 

It makes lead management way more efficient since they get to focus on people who actually want to do business. 

Is it realistic to ask for and expect to get at least 2 landlord references and 2 tenant references (current clients) if I am a " small time" landlord with one property, not multiple units?

Dismissed, actually more like Marxism!

All rents you get from this property has to go back into the SDIRA but if you get a 20 year mortgage (that the rent can cover) and can pay the rental off by age 65 you will have turned that $90K into several hundred thousand’s of paid off real estate.

The amount depends on negotiations between you and the property owner. 

Depends on which property you pull equity from.

Saul, Phoenix and Vegas are popular markets, but I’m not sure they’ll actually cash flow well with today’s prices and interest rates.

So the lender is in the clear and Lendbase isn't actually the lender.  

Quote from @Paul Whitehurst: Many will tell you to borrow money from Property A to purchase Property B, but that's known as over-leveraging and not recommended for a newer investor.