Effectively, every loan is the equivalent of a DSCR loan. 

So with that said can you guys suggest some actual links or books that are equivalent to the courses.

If your leaning toward obliging the request you might consider instead of giving 1-month free, offering to take the equivalent of 1-month rent off the successive month's rent for the remaining term.

Contact an attorney or the equivalent and find out what is necessary.It is going to be complex I think.

That home is the equivalent of buying a used car - the HVAC could go out tomorrow, the roof has only 5yrs left on it, etc. 

I bought each one with funds equivalent to what would have been 401k contributions from my paycheck.

I also have significant HELOC, credit card, solar panel, and other debt.My goal is to rent out my current house, purchase an equivalent house with a big basement or mother in law, and move my family into the basement/apartment, and rent out the top of the new house.

Assume also that rent for an equivalent place would be $3,000. 

The purchase price is around 300K, the payment is the equivalent to a 250K property and my DP is the equivalent to a 160K property using conventional financing.

I don't know if all states have an equivalent, but if they don't, you don't know what you're missing.