It sounds like you've done a lot of the preparation work required to hit the ground running. 

if the OTA has issue with you and bans you (there are some crazy horror stories that alone would deter me from listing on a single OTA), you are basically starting over.  

I am looking for the basics.  

Most hard money lenders require 10-20% down payment of the purchase price or total project cost.Holding Costs During Rehab: Yes, you'll need to cover carrying costs, including hard money interest, utilities, taxes, and insurance.

We basically want property to generate some cash flow and long term appreciation.

This is VERY BASIC finance 101. 

B) So you're going to combine unsheltered people and basic homeless?

Each area has its own rules on how it works, but basically, you buy the house, pay a deposit and agree to rehab the house within a certain amount of time.

This loan doesn't require any certain length of ownership seasoning or equity. 

I just used this basic loan calculator:https://www.calculator.net/loan-calculator.html