If you want to be serious TK player - you obviously will have to do a lot of initial effort and investment until you become "established TK provider". 

Starting with no cushion would be hard, especially getting established and waiting on positive reviews.

Go over the current terms of the lease/rental agreement and your expectations, so you establish a common understanding.

Brokers and lenders want a track record and I somehow have to establish one.

You're better off establishing solid relationships w/ the handful of brokers that control the majority of MF transactions in your market.

I just happend to be inconversation with her about establishing an unsecured line of credit when she mentioned a problem property that the bank had just taken back. 

I wound up being highly knowledgeable but having to "pay dues" to other experienced people already established in the industry.

Interpolation can be used to check our answers, or establish a range for the answers.Example:  If a seller says we have a $140k mortgage and need to walk away with $50k after the sale-so how much do we need to sell it for, considering your commission and closing costs?

Specifically, I would set a rental price at market and then offer a discount to specific types of establishments.  

Maybe as @Charles Worth said, the value is really more for newer investors as opposed to established folks who have been there and done that.