l/o and adjustable rates

what do you guys do when you find a possible l/o, sub 2 with an adjustable rate but the numbers seem right?

With a lease option, if the numbers are right, then I am not concerned about an adjustable rate mortgage. My monthly payment to the homeowner is fixed, so the adjustable rate is his concern.
On the other hand, with a Subject To deal, I have taken over the responsibility for that loan, so it needs to be looked at with scrutiny before doing the deal.

AJ give me an example of a sub2 deal.