Understood that DIYing something that I don't do and saving $7 per month (that I'm charging the buyer for anyways) could blow up in my face if there are unforseen results in this process.   

I can get Formica and DIY for around $500 for the 26 sq/ft countertop.  

Our policies clearly state 4 PM check in, and I couldn't accommodate an early check in anyway because the previous guests were still there and had until 10 AM to check out, then the house needed cleaning.

Unfortunately, most small landlords and especially DIY landlords fail at this causing problems in eviction court.  

I've done camera work and the plumber said they see light root growth, but I could clean the pipes annually to prevent growth and back ups.

And how are you cleaning in 10 minutes???

I know cat urine can be extremely tough to get rid of and will have to possibly sand and deep clean floors and then seal them.Main question: Is it possible to fully remove the smell of cat urine?

The tenant who wants to return has also been a very good paying and clean tenant.

It integrates very well with many other programs (Resort Cleaning, Pricelabs, Smartlocks like the Schlage Encode, etc). 

The house is in really good shape and the area looks fairly clean, but a couple people I've talked to have a lot of concerns of that area which is giving me second thoughts... any other locals able to shed some light?