Whichever one makes you sleep better at night, choose that one. 

He'll be working on 5 hours a sleep of night (if he's lucky) and you likely less.

i.e if someone gets bit from a dog living in my building, am I more liable if that dog is a 50lb pitbull than if it is a 15lb yorkie?

if you can somehow - you rent out all the rooms in a house and sleep on the couch or in the garage or something - that's fantastic. 

And yes, in my experience most wholesalers are basically just bird-dogging for investors who don't want to deal with finding properties.

Good credit score (800+) but low income ($70k)Candidate 2: Family of 5 (3 kids) with a business + a smaller dog (40 lbs bulldog) and ok credit (680+) but higher income ($130k) than other candidate. 

I think if there was more attractive rentals here, the same dogs in charlotte would come here and create a lot of chaos.

Bring in the big dogs. 

Realistically a cheap ac repair is $250, you’re losing time/money/sleep over an additional $250.

I would not rent to them because next they’ll be having sex with animals and and before you know it ,there will be a whole house full of dogs.