Not cheap, but rates range 11-13%, amortized over 30 years, but also come with no pre-pay penalty. 

He did mention a possible alternative to the recording of contract, basically having the end buyer/investor sign something similiar to a non-compete with a penalty of whatever my assignment fee is to prevent the end buyer/investor from trying to go around me after I gave out the property address etc.

If the work goes over the agreed date then their will be a late penalty payment.

Make sure there is no pre-payment penalty. 

And with IRS a pitfall are interest and penalties and paying for audit representation.Additional actions are needed to address Qualified Opportunity Fund and Investor Non-Compliance.Make sure your CPA is aware of what can go wrong. 

If there's a hole, it may be a red flag.b) sensitivity analysis: I examine all the assumptions, and make sure I can live with the worst case scenarios.c) "Stall and see": if they are getting money over multiple years, and there is no penalty for investing later, I would usually wait so I get some real performance data, versus having to look at theoretical pro forma information.d) Recession stress test: I will not invest in anything, until I subject it to recession level stress and see if I can live with the result.

An addendum simply references the name and date of the original agreement, states the change being made, and requires agreement and signatures from all parties.If it is just an individual tenant, or family/group that are ALL vacating a single unit, a simple "we agree to let ___ break Rental Agreement for premises 3456 Main St. dated _____ and vacate on DATE without penalty (assuming that is your intent), paying pro-rated rent only for days of possession, and returning the property in the same condition as when originally rented per the move in condition form dated___.

Yes, the money isn't immediately accessible to me (I'm not 59 1/2) - and I know you can always access contributions (not earnings) tax/penalty free regardless of age, but that's another story here - but when I do withdraw funds much later in life, everything will come out tax free. 

You need to do it within 10 days after you close otherwise you'll incur penalties.

Typically I would also try to get the note written so there is no prepayment penalty.