It is not the most cost effective, but they have remote wireless signals (no need for internet connection) with battery backups and remote viewing capabilities. 

Also, the batteries have to be changed about once a month.  

No but I bought batteries... lots of batteries.  

And even if they took down the smoke detectors or failed to replace batteries that liability is going to be on you. 

At speed you don't need to know your battery condition, for example.Fast or slow, you gotta know.

The Triad is was recently announced to land Toyota's 1st lithium battery plant in North America which is one of many dozens of companies moving to North Carolina. 

The wireless solution is not working well - batteries dying too often and complains that the bells just don’t work.  

AC filter, smoke detector batteries - do you change these yourself?  

If you dumped that 10k into this place then your capex/maintenance shouldn't be 20% since almost everything would be new/reconditioned.60k purchase15k down payment (25%)5.4% interest555 per month253 P&I, 215 HOA, 36 tax, 51 insurance,900 rentLeaves you with 345 mo, and 10k in the bank for reserves which is = to about 39 mos of set asides (20% maint/cap, 8% vacancy).If you get your loan to 5% vs 5.4 you're at 490 per mo and that gets you 410 left over.

It's easy to install, the batteries are easy to change out every year, and Am.