We comfortably could use the cash flow but could probably survive if reduced by half but only as long as have our tenant at the primary residence.

I am comfortable saying this because I have seen it work and replicated it.

I hadn’t thought about the risk of expanding my portfolio by having multiple properties over leveraged, although that seems to be a growth strategy that many use,  I’m not sure it’s one I’m comfortable with.  

They will be able to tell where they feel comfortable or not. 

What about tenants that don't have smart phones or  aren't comfortable using mobile apps? 

Whether it's gathering around the tree, sharing laughter over a meal, or watching the magic in your loved ones’ eyes, there’s nothing like the comfort of being home for the holidays.Merry Christmas from my family to yours!

I am most comfortable with long-term rentals, but I would like to try a flip or two to build my capital.

In case you haven’t read the previous responses or haven’t walked a mile in a landlord’s shoes. 90%+ of your problems are caused by your local/state government that you seem to be giving a free pass.

Pricing has changed but J Scott's one of the smartest guys around and is one of the books I always feel comfortable recommending.

I would have them stay there and critique the feel and comfort etc of the place.