I have acquired a piece of property that has an existing cell tower on it.

Either begin by paying your cell phone bill or having your parents put you as an approved person on one of their credit cards if they have good credit.

I looked at GPS tracking, but they need batteries changed frequently, and a monthly fee to be paid like a cell phone bill, any ideas would be greatly appreciated.

Grocery stores would be empty within 48 hours unable to order from their JIT supply, credit cards not working, not sure if we could maintain the electric grid, cell phone system gone - who still has a landline?

Never put all of your eggs in one basket. 

And homeowners are able to reach me anytime they want - they have my cell number.

Start there.If you decide that market does not work for the numbers you are looking for, then the Easter Egg hunt begins.

Your eggs aren't all in one basket. 

It's a chicken and the egg kind of predicament, somethings gonna have to give. 

I have had mostly great guests, but the few that I've had that were terribly messy (much of what you describe but also smearing pizza toppings on the floor, having an easter egg hunt (I found some of the eggs) with chocolate in fabric and pink maybe egg coloring staining two sets of sheets) and yet were given 5 star reviews from prior hosts.