Purchase price roughly 600-700K My concern is financing strategy.... 

So that initially gave me concerns that his CPA does not have his best interest in mind!

I messaged an online attorney and they seemed to think I had done everything in my power to alert them and that in Texas you have to let them know about the dangerous condition and take steps to remedy it.

All 4 rooms would share the one bathroom in the main house (which is my major concern).  

That's what most of them say.....Fun fact about myself:I am 1 inch shorter than when my youngest daughter was conceived and then born....motorcycles are FUN and apparently dangerous, but I can't wait until I can send my two girls off to college and buy another bigger one....2 wheels are life!

They have been late for three months in a row including this one and we are concerned that they may not pay the full amount this time.

I asked him about the surveillance camera he said he doesn't want it anymore, the camera is still wired and I'm concerned that he may be still monitoring my activity on the driveway since the camera can be connected to his phone.

I have similar problems with our plumbing and construction customers where customers negotiate, agree to a deal and then try to change the deal so they for something selfish that benefits them and with no concern or regards for your welfare. 

As far as I'm concerned, this measure is unenforceable without that process defined and the agency staffed to handle it.

Are there any other dangerous turn-outs to be aware of and how to protect against?