I am asking what hidden problems do you see coming up that I am not taking into account.

And then when the end buyer closes with the seller you get the profit, and some kind of fee from the note buyer?

Escrow fees?

As you get more knowledgable you will probably want to try to buy for yourself than just get bird dog fees.

In the area of interest (N metro Boston), I see similar units renting for 1000 - 1200 a month, + tax / condo fee (200) giving me about 400 a month income.

Thinking that since the loan itself will remain in my name I can still move the property over to the LLC for a small fee for the new deed.

How can I work with the seller so that it is understood that there is no agency involved, and in this case is it legal to collect a commission or finder's fee if the property does sell immediately?

You could probably do an assignment of contract for fee.

If a realtor, don't forget to add in the realtor fees.

Be sure to include ghost expenses like interest paid while marketing the home, taxes, Realtor fees, closing costs, etc.