Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

I have paper applications at the open house so anyone interested can fill it out right there or I offer to email them the electronic version.

If I go with Wynd, they charge $15/mo by device and they recommend one per room.

I am a musician and composer that works with electronics so, I’m seeing the loft which is probably 6 x 8‘ as a potential studio however, I do plan to AirBnB it for the next several yeas.

Lawyers will always tell you the maximum protection devices available.

We live in an electronic world so people don't favor doing that anymore.

This very comforting device alerts you if the noise level is above a threshold. 

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

I am stumped on this one as to what devices etc would I have to meet this requirement/?

Leaving the folks to their own devices to figure things out, with empty wallets and full credit cards.