This has to be industrial or warehouse space. 

You are renting living space.

My short list of things that I think are on the way out:LaminateGlass block backsplashVessel sinksDesk spaces built into kitchensherringbone wall papermicrowave over the rangeFaux Tuscan or Moroccan stuff (has been out for awhile but you still see it)

If and when my tenants leave, I would go to the bottom of the waiting list to rent it out again and thereby be sitting on a cash drain with the mortgage and HOA dues, and I would not even consider moving out of my primary residence to live there due to the space my family needs.

So I like the idea of marketing all available properties you have in one easy to access and advertise space.

The neighbors mentioned they were occasionally spraying the outside steps as the bugs were just spilling out.I'm the kind of newbie investor that gets really excited about the potential for a property - I literally spent hours at a time in my first rental planning out the rehab and envisioning what I was going to do to the property to make it look great - exposing brick, reconfiguring upstairs layout, enhancing outdoor space, etc.

There were reductions in amenities, space, and overall upkeep of the property that I couldn't overlook.

Do they work well enough that you do not need to put one in every other non living space (i.e. bathroom, kitchen)?

I've been primarily looking at retail spaces that houses companies like Walgreens, CVS, etc.Any input is great!

Seniors who are downsizing but still want a space for their grandkids?