When I ran my initial numbers, I used my standard 10% vacancy and $50/month misc to cover maintenance upkeep. 

It holds the same amount of weight, in court.

I’m heavily weighted in real estate.  

The determination from the municipalities is usually based on weight, and not what is best for keeping water out of the home.Before reading any further I do want to share that I am a landlord, and fully understand that spending extra money on a rental property is not desirable, but I will be candid with the issues of installing multiple layers of roofing based on the thousands of jobs I have participated in.The differences in performance can be dramatic depending on what kind of material you are referring to.Asphalt shingles:Applying a layer over the top of another layer of asphalt shingles can save you 10-15% on the overall cost of the job if you are going over 1 layer of asphalt.

Actually, it's more physics than geology (there's nothing geological to stop islands from getting subducted under a tectonic plate in a way that would appear to be "tipping over"...from a physics standpoint though, adding a relatively small amount of weight to the land mass wouldn't increase the likelihood of the event)...

For example, if you know you need to open the kitchen up to modernize the floor plan, you'll most likely make the decision of which wall to take out or modify based on which ones are weight bearing, where are there the least amount of gas pipes, plumbing, venting, and/or electrical, etc. 

Also if they have pets, are there restrictions that anyone recommends placing; like no cats, dogs under a certain weight and breed restrictions and a non refundable pet deposit?

😉Good luck 🍀 and we'll be praying that you get a great tenant and a high price that can eventually help with the upkeep and rebuilding our city, esp. the beautiful sprawl of the SE MEM area ... surely REI can still be Way better in the long run and than mutual funds, but IDK ?????

4) Tell her to look in your penny-saver for a bit of an older SUV5) Go through a pro & con list (weighted) and illustrate all the other things that money can buy.

With the approach of selling the house for retirement, or no more taxes and up keep that kind of approach.