Handyman Packages:$59- 1 HR Furniture Assembly$69- 1 HR Shelf Installation or 1 Curtain Installation$65- Door Lock Replacement$89 - 2 Curtains Installation$89- Light Fixture Connection$95- 2 Hour Shelf Installation$99- TV MountingPlumber Packages (Great for Faucets, Clogs, Sink/Toilet Replacement):$69 - Clog/Slow Drains or Toilet Flushing Fix or Faucet Replacement$99 Sink Replacement or Shower Faucet Replacement$129- Kitchen Sink ClogHave any questions, comments, or inquiries?

"professionally done" improvements (which doesn't prevent one from hiring a bad worker..). 

You can also have them schedule/complete preventative maintenance asks such as smoke detector and A/C drain line cleanings.

However, I would like to prevent making some of my previous mistakes on my next purchase.

And Texas is a landlord friendly state, I just had an eviction suit on one of my units and the judge offered me to join an eviction prevention program, if tenant qualified I would get paid, I said yes. 

Obviously, the time and transaction costs of doing one house at a time prevents us from scaling. 

Is there an eviction moratorium in your state that's preventing you from taking action? 

I paid them an arm and a leg to put a new AC in and 2 months later its leaking again.Apparently they did not clean the drain when they installed a new AC so it clogged and ruined tenants belongings.

Personally, I might do it just to help prevent co-mingle funds. 

You're doing the best thing you can to prevent this from happening by having it in your lease that they need to leave it in the condition they found it, plus sending them a list of common security deposit deductions.