Pros of key-less locks:- Able to set-up easy access even remotely- No need of changing lock cylinders, make key copies, or set-up physically the locks- Less risk of tenants having several key copies running aroundCons:- Some tenants are not up-to-date with technology (specially elderly class), so you may need to exchange the smart lock for a conventional one- More added cost for technology- Battery operated- Some have covers that if lost or damage, they are not easily replaced (specially battery cover). 

Consider the well-being of others in your projects.

@Gina Carter I’d say trusting you’ll find good tenants (qualified and respectful) who pay on time, plus check in on the physical property outside monthly, and inside at least quarterly to check filters, carpets, toilets, etc.

As long as they are reachable for emails, calls and physical mailings. 

Alan Ceshker- Attny- does many non qualified loan assumptions and wraps.There is an easy way to get around the due on sale clause should they physically invoke it. 

Check and see what actually needs to be done in the flat, could very well be repairs needed and their concerns are justified. 

@Michinori KanekoThere is a tax terminology of "constructive receipt" which indicates that income is earned by you even if it is not physically with you so long as you have a right to it or with one of your agents.The pre-paid rent would be taxable in year of receipt by the property manager.

I have a 401k, sep ira, Robinhood, lending club, physical gold and silver.

Pets may create a noise nuisance or physical danger to others.

Tell us how you do this management of thousands of maintenance requests across such a vast physical area.