NQSOs, once vested, allow you to exercise the option at the exercise price.

You will also need to analyse GRM and CAP rates for other similar properties in the area which have sold recently {If your Father owns similar properties, you should be able to get some insight into the typical operating costs} to see what price is being paid for cash-flows.The exercise will be educational for you, but in the end, the current ask price is too great for the cash-flow you would be securing.  

Someone can have no control and just flail their arms everywhere, wear themselves out, and have limited to no impact simply because they do not have targeted control and laser focus on the objective.Conversely a few well placed strikes with proper technique in a matter of seconds will render the attacker down with the least amount of energy spent.We had an exercise over 10 years ago when I was first licensed.

@Herman Ryals A great exercise, IMO, is to 'favorite' houses you like and don't like in an area that you think would be great investments.  

I wanted more substance, and this was an exercise in frustration exemplified through a $3,000 program that taught me to write goals down and talk to people, albeit a bit of a glorified way. 

But it is all a good exercise for you.  

If you are into any sports or exercise, see if you can get a similar benefit.  

I remember when I was younger, I had the chance to look at an exercise guide that showed pictures of all the muscles each exercise hit.

However, you can have the tenant buyer pay a down payment, and then it is treated just like a rental after that and the renter has the option to buy based on the agreed upon contract price within the agreed upon time they have to exercise their option to buy.  

You could investigate as has been suggested, maybe even view their current house, but there are tenants out there that don't need a Sherlock Holmes exercise to straighten out their stories.