So, they chopped up the lot and I didn't even own the driveway, mailbox or septic system.  

I am willing to pay the price for software and systems , please help!

Don't assume the owner has complied with such laws or that their system meets regulations. 

I want to be involved in the American system that provides living accommodations to those who are looking for it.  

Now, the first deal that falls through because somebody else sells it out from underneath me because I didn't take the time to cloud title for a whole 60 days (tops) is probably going to do a lot to change my mind.

I am putting together  a different system.

To answer your question Shawn, there is no system or company that allows a prospective tenant to apply to multiple properties with a single background check.

But typically it will chip or delaminate in the 4-5 year range, especially if renters are using it as they are going to be rough on it.The whole "reglazing" term is also a misnomer, because it's not really reglazed,glazed involves a process of dipping the tub in liquid porcelain, the 'reglazing' process is an epoxy spray on system and the mils thickness is nowhere near what the original porcelain glaze is, it's two different animals.Around here is $400-$500 for a 'reglaze' a bit more if you are changing colors.

I see a lot of references to property ratings using A,B,C,D ratings.Is there an official rating system to specify the qualifications between them?

Any damage incurred to the AC system by filters or lack of, will be the tenants responsibility.This list is not completely inclusive.