If you play inspector gadget like @Michael Julian is saying to do and you find out he is living there, then you would get her kicked out.

Duplex is currently vacant but should easily rent as it is in a highly desirable area and retail has an existing tenant on month-to-month.Retail space is my main concern at the moment especially with the current tenant being a long(er) tenant as a Vape shop that most likely sells CBD and the likes.

He doesn’t smoke or vape, any painting was 7 months ago, and as far as we know there is no mold issues.

Hopefully the stuff he Vapes doesn't contain the hydrogen cyanide they are finding in the bootlegged mix.

Do you, or anyone that will be living with you, smoke or vape?  

What tenant wants to think someone is looking at them on a monitor like a watchdog.I understand that the temperatures in Big Bear drop to zero and it is a good idea to be able to monitor the temperature and to have a regular burglar alarm system that is monitored since properties sit vacant for frequent periods.Put the gadgets on your personal home!!!

They are cheaper and look expensive (one simple drawer gadget and they soft close too). 

All is well for about four months, until Chad ditches urban toast for the up and coming free trade CBD Vape scene on the west side of town.

For your lake vacation rental...fishing equipment, a non motorized boat, a well stocked kitchen with all utensils and gadgets, a wine fridge or a kegorator with a craft 1/6 bbl, gas or charcoal grill, chimenea, cornhole game, a SMART tv, an accurate pellet gun with pellets or a scoped single shot .22 or .17HMR, some adult movies and a blue ray player in the master bedroom with an HDTV, bubble bath if you have a tub or jacuzzi, an indoor/outdoor sound system, some mountain bikes, binoculars, some games like trivial pursuit/electronic darts, two single shot shotguns and a skeet thrower with skeet, an outdoor firepit, a "help yourself" herb and vegetable garden, tiki lights, a small trebuchet for the kids, some basic tools like a socket set/wrenches/screwdrivers, and finally the most important thing...mosquito repellant.

The reasoning behind this: water usage is pretty much going to be an average amount per person, regardless of unit size, whereas with electricity, a larger unit typically uses more electricity: more outlets, gadgets, lighting, heat/air.