Some of this data can be found online (if the county offers this service).

Your scenarios should be based on the confidence of your projections (in statistics, it is based on the # of standard deviations from the norm based on the type of distribution for your data).

The cost will be based on the difference in value rather than the full price.You may have loan related fees when you purchase, if you're using a loan. 

I know what properties work for me so I'm not sure I would have bought another before the jump in values. 

So I use to do A/C work before I went back into the Army...What I would tell you is before you buy your next property, walk outside and check the data plate on the A/C system.

If your house goes down in value, so should your taxes, which would improve your cash flow without having to raise the rent.Don't get me wrong, I don't hope my houses depreciate (mainly since I like to refi to get all my cash back out to use again), but there is a silver lining when it does go down.Joe VilleneuveREcapSystemA2REIC

And many of the new people on the block that are HML started in post 07 08... and they got the benefit of the free fall in values.

I've taken some data from the NAHB 2013, so have a better idea now.

@Matt Cramer  Without knowing the fine details I can only give you some basic input...The trailer will depreciate in value, but ideally the lot will of course appreciate, so the value I imagine is in the land. 

Including signatures by the person who didnt turn the reciept in to the office :-)Our main tracking comes from quickbooks where every reciept is recorded, every check, every hud, every loan, basically every piece of financial data.