I currently work a traditional 9-5 for a chemical company (I have a computer science/software background.), and work part time for a realtor/real estate investor.

Warranty fine print says "chemical deposits" void coverage.

My current occupation is a chemical sales engineer.

If there is a well house, tenants are tempted to store chemicals and oil near the well head.  

If I'm wrong here, someone please chime in, but it took me about 15 minutes of research to find a couple other sources that went against what was written by Thomas.Anyhow, you're right, Michael — my words were too harsh, but again, I think light should be shed on quality control/basic things like this, too (assuming I'm right).

I would look on Vrbo and airbnb at other similar properties in your area to see if this is realistic.Then you have some money for maintenance and upkeep, consumables etc.I would put all this in Excel and see how the numbers look.Then you can easily adjust numbers to look at options like a remodel or full gut of the house.You mentioned a pool so you'll want to have a professional pool company maintain your pool to limit your liability on the pool chemicals being off and causing a problem for someone.

Don't judge yourself too harshly on your first deal as you will likely evolve and do better and better deals!

A 10% late fee is very harsh.

-Use some sort of sealant where the foundation wall meets the concrete patio-power wash cement-possibly apply a chemical cleaner-paint once dryAny advice this would be much appreciated. 

Sorry to be harsh, but don't waste time on unappreciative people.