Things like male/female, dogs but no cats, fixed or unfixed, how well the dog is behaved etc.

The good news is that bad credit is not a character defect or unfixable.

.- Caved in celling with open access to attic, from roof leak that went unfixed for 3 years.Most repairs were sweat equity.

----------In the end, we walked anyway as we bought the house sight-unseen and the layout was freakin terrible and unfixable.

Chickens, goats, I would notice those too--but I would not send in a spy.Best scenario in my option would be to try for a pet deposit--and the unit still might turn because she no longer trusts you.Seriously, going to court over a kitty cat (no matter what charges she brings) it's over a kitty cat--could cost you plenty.And in my experience, fixed cats are not such a problem indoors as unfixed cats.PM could have posted a notice we will be entering in 2 days between 9:00am and 4:30pm for your requested pest remediation (or something like that)--that way there is no misunderstanding.Good Luck! 

The problems I am realizing is that the more I search I've noticed that houses under 250,000 in my area have major flaws such as location and/or unfixable architecture (mostly tear-downs).

Garbage Disposal for instance would go unfixed.

If you use similar underwriting that rent growth is similar to inflation, the cash flow will improve slowly (note even if rent growth equals unfixed cost inflation, the cash flow will still improve if you have a fixed rate loan).  

The alternative is your tenant likely won’t fix it and you run the risk if a simple leak that would probably cost you a few bucks to fix, going unfixed and continuing to leak and you end up with a much bigger problem and a lot more damage that ultimately costs you much more to fix down the road. 

I understand that the mold problems usually arise from either 1) water leaks that go unfixed for a long time, and 2) use of substandard materials.