I've been using non smart Schlage BE365 locks for 10 years or so for 2-3 unit buildings I've owned.   

The trick will be the expense of installing and maintaining the devices. 

I will recommend considering all smart device capabilities so you can manage them on one app for convenience. 

Quote from @Sherylyn Holden: @John UnderwoodHospitable: $104 a month for 5 properties on the Professional plan (this includes Dynamic Pricing and the smartlock and thermostat integrations to my propertiesNotion: FreeBlink: $10 a monthNoiseAware: $30 a month (I only have this on 2 properties currently)Schlage and Ecobee have no recurring monthly costs, just the upfront device costSimplisafe: $10 a monthQuo: $15 a monthGoogle Workspace: $10 a monthQuickbooks Plus: $120 a monthTotal: $300 a month for 5 propertiesI'll be honest, I'm not sure the exact % of net annual income.

If I have online version, how many users/pc/devices I can get?

Hey @Mike Allen, I use the Schlage Encode Smart Wifi Deadbolts at my STR - one for the front porch door into the property (it's a duplex), a second for the main entry door into the upstairs unit itself, and then one on the supply closet in the unit for our cleaning team.I don't have any third party management software in place at the moment, and therefore can't speak to the integrations at this point in time.  

In the leasing contract it clearly states that the tenant is not allowed to change any security device or locks without written permission from the landlord.

Smart locks weren't as reliable a few years ago, but they've come a long way. 

My goal is to make a smart, conservative first purchase that reduces my living costs while setting me up for long-term growth.Any guidance, real numbers, or recent deal examples would be extremely helpful.Thank you in advance — I really appreciate this community.

This wouldn’t be a full inspection, but rather a high-level look for obvious habitability or safety concerns so issues can be caught and addressed early, before they turn into larger problems or potential liability for the owner.Our current proposed pricing is $42 per unit for the smoke/CO inspection and $50 per device replaced, if needed.