Electronic door locks work great, until they don't.  9.  

Just like you can reduce operating expenses through things like online rent payment, electronic lease signing, self showing lock boxes, etc.

I wouldn't be opposed to rent being pre-paid for the year with an executed contract in place but I would expect payment to be wired or electronically received.  

The best method for collection would be electronic payments through one of the many online options, direct deposit from their bank to yours, or you give them deposit slips and they drop the payment off at the bank.

According to the article, "If Samsung Electronics Co.

These are easy to rekey between tenants and not as expensive or temperamental as electronic locks.8 avoid carpet9 don’t be afraid to add a little extra touch as long as you keep budget in line.

Here you go - https://www.kwikset.com/SmartSecurity/Electronic-Locks.aspxYou can rekey the lock with a physical key for a few bucks. 

I closed the purchase remotely, signing documents electronically, and got the keys in-the-mail.

You can get him to sign electronically if getting physical signatures are not a feasible option...I use DocuSign and AdobePro for almost all of my real estate related contracts...

Although with electronic filing, there will be very few with this field.