They say that upon the completion of a deal, they will refund your membership fee back to you.

Find a flat fee or 1% commission agent that works with volume investors. 

Many of those that do stay and pay will be upside down on their investments if they have to pay some large fee for structural repair.

hi @Tim Kaminski - transfer taxes/fees depend on your location.

I get the owner's statement every month (from Buildium) that shows rents, vacancies, property management fees, maintenance expenses, etc. 

How how I put myself somewhere in the middle of the deal legally in contract so I can receive my assignment fee at the COE for bringing the 2 parties together.

How much in legal fees to prepare for?

Also there is a management fee to pay for all of the above.

The LOI provides clear written and agreed terms to help prepare the contract.Sales Price, Due Diligence period, financing terms, Who is paying what fees, what you are requesting for due diligence (leases, financials, maintenance schedules, etc.), Hard or Refundable Earnest money & terms for that, broker representation, title company, attorney info, etc.Best wishes to you. 

(plus, I get $1500 credit in processing fees)?