maybe check to see if HE exercised it himself :) I would pursue it in a friendly manner for a larger reimbursement than what he is offering & I would definitely find another attorney asap.

I will challenge you to do a investment exercise for 15 years using different methods of investments and take the decision which is best for you .

If you cannot buy right, fix right, and sell right, this exercise in flipping will be very painful. 

And there is a lot that can go wrong here (opex and capex not accurately accounted for, property value or rents go down, tenant issues, seller files for bankruptcy, issues with loan servicer (I've experienced this one), insurance issues, mortgage company exercises their right to call the loan due on sale, title issues, judgements etc. there is a lot that can wrong with subto).

Outside of real estate, spend more time with family and friends, sleep good, eat good, continue to exercise and travel  (hopefully COVID will be a thing of the past).

After she gets bank financing we will put a 10k lean on the property as our coaching fee that will be due when the tenant buyer exercises the option.

And it appears you are in some self induced panic attack for what probably is a marginal issue at best.

The second list never gets hit with marketing and most wont do this exercise do to the cost of the list. 

You will definitely learn a lot from this exercise and I recommend all new investors do it.

All rights, powers, options or remedies afforded to Buyer either hereunder or by law shall be cumulative and not alternative and the exercise of one right, power, option or remedy shall not bar other rights, powers, options or remedies allowed herein or by law.