I would much rather go in prepared instead of an unsuspected curious resident that breathes on my neck watching over my shoulder as I pull their nasty hairs out of a shower drain.

If they have two long-haired dogs the filters are probably a mess and they, not you in my opinion, should be responsible for that. 

I'm kind of splitting hairs here...you can still buy the property...but FHA/VA/USDA loans are assumable.  

There was writing in the shower wall (played tic tac toe), oven was bad, fridge dirty, pet hair on most of the baseboards and an odor.

No one bought new trucks, or ate out, or had their hair styled or nails done. 

This one has some hair on it.Unless you already have experience dealing with the type of issues you mention, and have a good understanding of the costs to remediate, you are playing with fire. 

I grind my teeth, sometimes my hair falls out, back of neck is tense and I need massaging often from stress.   

It is the only system that allows me to wash my very long hair without running out of hot water ever. 

This LOCKS you into the loan because you will have to bring cash to closing just to sell it, or the lender would have to take a hair cut just to get it off their books.

Wanna-be-entrepreneurs are a dime a dozen.Whether you are looking to-Invest in real estate-Open a bar or a restaurant-Open a service shop (hair salon, barber shop, mechanic, jeweler, dry cleaner, etc)-Start an online business (amazon FBA, dropshipping, content creator, education, etc)-Build a car rental fleet-Become a real estate agent-Build a landscaping route-Build a pool cleaning route-Start a vending machine business-Invent a new product (i.e. shark tank)-Etc etc etcAll of these pursuits can still be profitable, but there is just more competition than ever before due to the exposure and all of the relatively simple business models being exposed online.Real estate has fit into the bucket with all of these "simple" business models because investing in real estate is a very basic, simple concept to wrap your head around.