I couldn't find a user agreement to see whether or not the could sell it. 

My question is what is the option amount I could expect from an end user.

I hope this as seen as a a way to make things more user friendly, I'm definitely not trying to gripe or anything, but I'd be curious to hear what anybody else comes up with also!!

Would be nice if the keypad alerts the user that the batteries are low or maybe there's something you can recharge?  

Roy,I love the innovative idea.Your Concept: negotiating a convenience for your niche population and bill users later.Possible Improvements: negotiate an affiliate relationship with service provider (a little kick back).Potential Other Uses: similar arrangements with coffee shops, laundry mat, groceries stores, etc.No since in just focusing on rents when you could be an agent to help with all living and lifestyle expenses.

John Jackson's Postshttp://www.biggerpockets.com/posts/user/LeasingToBuyBrian Gibbons's Postshttp://www.biggerpockets.com/posts/user/REISkillsIt will take you about 6 months to read all those.Ask specific questions here.Dodd Frank is involved with rent credits, use a RMLO for the ATR.

It really depends on your market and how many users they have there.

We've got a HUGE group of users in the Los Angeles area, so definitely be sure to dig in and start engaging here.

SFH on the other hand, you can usually command more rent but you have more hard costs to account for as well as maintenance.

Real Estate Rewind Starting over http://www.biggerpockets.com/files/user/brandonatbp/file/real-estate-rewind-a-biggerpockets-community-book Good luckPaul