Start running houses through Bigger Pockets Calculator and exercise your mind to be able to look at a home in your area, Know what it is worth and what it will rent for.

It's basically locking in a purchase price and a time frame in which you can exercise your option to purchase the property. 

In the lease your going to want to be able to sublet In the option your going to want some or all of the rent to apply to the purchase when or if you exercise the option to purchase.and in the purchase contract you going to want the best deal you can get Why not do a Sub2?

If your buyer decides to exercise the option and then your seller doesn't go through with it, you're probably in for at least one and potentially two very costly court cases.

My first post :) I'm new to REI and followed the shiny into buying ($390) and attending a goofy 3-day workshop (currently sitting in Day 2 in Danvers, MA) on tax lien buying by TAX LIEN WEALTH BUILDERS, previously known as UNITED TAX LIENS, founded by Jay Drexel, who also built MarketPlacePro.It's been almost useless, a giant patronizing waste of time (as @John Underwood and @Ned Carey has driven home - don't pay for education you could obtain more quickly and thoroughly on the googs or through networking), but an interesting exercise in appreciating their polished presentations, sales strategies, and trying to understand what these people's actual business model is by reading between the lines of all the shiny idealized and exaggerated examples of rapid wealth generation.

This exercise shows the issues will be in the effort to fund and the closing costs.

If they won't or can't and there are problems that affect me, the landlord, then I can exercise my right to terminate the rental agreement upon expiration of the lease or with proper notice.

I am setting aside reserves so that when it happens, I am not in a pinch.Even though most landlords use cash accounting vs accrual, it would be a good exercise for every one to brush up on their accounting.  

However, I have a prime opportunity to exercise the drive for dollars strategy while working, because my job consists of me driving around the city.

It's a good exercise to do anyway, but as @Charlie MacPherson points out you'll need to rationalize (and defend) your numbers.