You would be logging all the other expenses that you write off as a business owner. 

I am working on a partnership with some friends where we could go in with cash on a 53 Acre property with a 4 bed 3 Bath log cabin and 3 smaller identical cabins that sleep 6 a piece.

You are the reason I log onto BP every day

Tracing is as simple as keeping a log of dollar amount and where it was spent.

Are there any logs that are rotten or insect-infested (this is can be especially common with the sill--i.e. bottom--logs)?

Keep communication logs in writing. 

Investment Info:

Single-family residence buy & hold investment in Lehigh Acres.

Purchase price: $75,900

Cash invested: $15,180

Sale price: $129,500

This was a condo I rented for two years. I ...

Again, MANY states are non judicial and don't have any docket entries and even in those states that do, you are saying some "bot" you create is going to log on to a secure site and somehow locate a case number, and some how download the docket entries?

For me it very convenient to just log in to the owner portal and have the ability review cashflow/p&l statements, download expense reports for each property, pull lease agreements, make owner contributions for repairs if necessary, etc. so when I am dealing with my banker in getting a new loan for a property, I can provide him the financial info on my rental portfolio quickly.

If I have their SSN and other info I just log into my account and key in their data.