Worst case: a rate chewed on the wiring somewhere in the wall and causes an occasional short, like when a heavy truck drives by.

Could be biting off more than you can chew.  

(chewing carpet, subfloor, door frames, cabinetry, etc.).  

That thing works despite it's age would chew through a 2X4 in about 15 seconds with a clean hole. 

I hope I am not biting off more than I can chew.

You are going to be dealing with a real cutie that isn't house broken for a number of months, chews on everything, must dig in your back/front yard, etc. etc. etc..I know this doesn't answer your question about requiring them to spay/neuter the adult dogs but I just wanted to point out the potential destructive ability of a puppy (and just in case you think I'm an animal hater, I've worked in greyhound rescue, have rescued dogs myself and am currently in cat rescue).Gail

Anyway, maybe I'm trying to bite off more than I can chew right now but I was hoping that there might be more creative ways of approaching this potential.

Considering this is my first deal I don't want to bite off more than I can chew.

You can walk and chew gum at the same time.

Unless you fully understand what these properties entail it is best to look in other areas.I know people that do incredibly well but I also meet people who get chewed up and spit out of these areas quite often.