Two different bodies, they have different forms.Be sure to memorialize or write down whatever options you end up exercising, They should sign a Termination Agreement with you.

Are there exercise facilities?

I would always exercise EXTREME caution when moving forward with unqualified tenants during this time.

if its tax once the option is exercised tax is due at that time..

Is the cost segregation exercise worthwhile given the purchase price ($2M)?

I think i know what you are trying to do, but this isolation exercise isn't giving you the answer you want.

There are a few beliefs here I would like to invite you to challenge, in the very least it's a good thought exercise. 

The "extra" rent that you pay above the fair market rent can be applied towards the purchase price of the home IF you decide to exercise your option to buy as well.  

people are people no matter their wealth my two partners in the 2000's could not be more dissimilar  one owned every thing out right and drove a gently used SUV type vehicle. 

., incentivize by saying the purchase price will be $285,000 if they exercise their option on or before 2 years, or negative reinforcement by having set rental increases if they do not exercise the option by x date?