I want to continue my research mainly into Buy & Hold investing and also look into ways to get into the game with a small amount of start-up money. 

We basically offer all of the services of a turn-key company without the commitments.

Huge red flag, never exchange any monies owed for services unless the tenant is a hooker and you get the service up front.

No idea what the $650 is for.very fast talker and gets upset really easily when you question his service.

However, I've seen the full income statement from the last 2 years, and the previous owner hasn't been making nearly as much as I would expect, mainly due to high costs.First question: should I be worried that this is a lemon... or is it an opportunity?

I ask for 60 days' preferred notice, although they only have to give 30,,  and give them good service and a nice place to live. 

Anyone has any recommendations for a good certified well contractor that services the twincities area?

Although, I don't really know what you're paying for this service.

My main goals are to discuss template contracts that are in accordance with local state/municipal law, and also just generally learn more about the do's and don'ts of wholesaling in MD.My question for you all is: what other questions would you recommend I ask?

@Daniel PattersonDefinitely check out Frank's book like Roy mentioned, but we typically use Cash-On-Cash Return, Cap Rate, and Cashflow after all expenses, renovations, and debt service.