Old folks who have money and no memories are pretty boring company, so that should NEVER be a goal.

So I'm not trying to sink TOO much time into it, although I've invested lots of time already (having a 3 year old cuts my online time drastically, as I don't want him to see me play on the computer all day (after a full days work).

Who else has been fascinated by IBM's Watson computer on Jeopardy?

Compute a PV using your terms and you get a loan amount, which I would use as the price.

I'd guess you then want to use this to compute an "expected value" for unit trashing.

On closing day I was $150 short for closing, borrowed $200, then lost my keys at signing that cost $50 to replace....Ahhhh...memories....First renters moved out in the middle of the night, next one stayed for 4 years.

You will also have tax advantages, debt paydown, and potential appreciation that isn't computed as an advantage here.  

My memory has failed me, so I'm looking to the collective memory of BP. 

Sorry for the delayed response my computer was crashing and took about 3 weeks to repair!

People have fuzzy memories about agreements and get funny about money down the line.