Maybe a bit of a stretch, they should have an cost-effective electronic lock which can be operated with your cell phone ap.  

Provident Equinox- spectacular 60-acre Lifestyle Township.Close proximity to major IT and manufacturing hubs like Global Tech Village, Bannerghatta Road, Electronic City and Bidadi Just 3.5 km away, the NICE expressway offers signal-free connectivity from Hosur road to Tumkur Road

And that's just the technology for us as owners, that doesn't include electronic technology like flat screen smart TV's, wifi, cable internet, etc. 

When I graduated from High school in 1985, I had two choices; either go to school to become an electronic tech or find an apprenticeship and become an electrician.

Construction work is underway on one of the Austin area's largest projects: Samsung Electronic Co.

Now tenant is requesting that I send deposit refund electronically.

Your lender could set up an account at your bank and transfer money to you electronically as you go.

I recommend a non-locking door handle and an electronic deadbolt like this: https://www.amazon.com/schlage...

I've recently switched to electronic payments using various online services and require all tenants to pay this way though I still maintain the PO Box for all of my mail.Good luck sir!

Rent should be paid electronically as much as possible.