The only costs you are legally required to segregate are the deposits collected. 

Now collecting the judgement is another story.

lease execution/rent collection and expense tracking??)

In any action with respect to this Lease, the Parties are free to pursue any legal remedies at law or in equity and the prevailing Party in litigation shall be entitled to collect reasonable attorney fees and costs from the non-prevailing Party as ordered by a court of competent jurisdiction"I think this should protect me.

You can collect rent while it sits vacant and releasing fees. 

Items to consider when you rent the homeYou will collect gross rental income and pay for expenses(Insurance, RE Taxes, Interest, Repairs, etc).

Collect your fee with the rental application and make sure you get a list of their three past landlords. 

   #2 is the way to go - and even better, there are companies that will install, maintain and collect from the machines for you. 

It will save you almost all of the visitors you're hard-pressed to collect and direct to your web site.

Perhaps option 3 is the best for you, especially if you're okay with collecting the current months rent in 3 installments.