How long would you let them "settle in" before laying down the hammer?  

Combine that with some YouTube videos and there won't be much you can't accomplish by yourself (depending on your level of skill for swinging a hammer).You can pretty much count on new flooring, fresh coat of paint inside and out, new lighting, and remodeled / updated kitchens and bathrooms.

As an additional document to verify that it was rent ready for the IRS, I'd have a signed lease before I swung a hammer.2- I'd depreciate the items replaced through their date of disposal.  

Home has holes from vandalism in every room, some appear to be from a hammer and some are very large.

I used to watch guys on the job sight using a screw driver as a hammer.

might be in order.If you are in there swinging a hammer, etc. you should be compensated for your time, either in an agreed hourly rate or reduced equity position for your uncle***.

Look more into the septic cost and see if you can hammer down that expense.  

How do you get hammered?

The attitudes and thoughts, logic or justifications of those who have done past seller financing transactions, or think they know, have been hammered and tossed out the window......new rules! 

My first reaction was that this feels like a bit of killing a mosquito with a hammer, but your later postings reveal that you find them to be a troublesome tenant.You likely have cured them of fixing things without your permission, but I doubt their complaining is going to stop.