The sump I installed had a 120v alarm with battery backup that required annual service performed by the company under the installation warranty.

Mine is battery powered, I set it myself for every guest and it has a backup key in a lock box. 

I also state that our property managers will be reaching out to them in the following weeks to set up times to replace batteries in the smoke detectors and other basic maintenance.

Typically I provide them with a mini-gift basket of the necessities; light bulbs, batteries, $25 Lowes gift card, cleaning supplies and air filters. 

@Aaron LandsYou've probably already done this but consider putting up signs.Consider also putting very visible fake cameras to save the money on the camera options.We have used a solution called SWAN smart camera (Menards product) which has motion activation and you get about 1, maybe 2 weeks of use on the batteries. 

.-  Can be wired for power or battery/solar powered.

What were the circumstances, and what has changedbesides being on parole (not necessarily a deal breaker) And, is misdemeanor domestic battery OK?

Guest will break cups, towels will tear, a toaster will break, etc, batteries for remotes, so maybe $50 per month at least for such incidentals.As someone mentioned above, with 10% down and the higher rates will be hard to cash flow until you can refinance when rates are more favorable.

https://www.wdrb.com/news/business/ford-battery-plant-will-b...Just one of the big things going on in our market, we are very fortunate. 

Just remember all of these wifi locks are battery operated and require semi-frequent battery changes.