Charge the old tenant for cleaning and repairs, unpaid rent, and other expenses.

Plus they’d be collecting late fees I assume you’re not charging. 

Does that mean they’re paying 10c/kwh already and charging you 49c/kwh?

When I asked her to provide the bank statement showing the cash withdrawn, she said she keeps cash at home.

If so, you may choose to simply add it to the lease as being damaged at move-in so the tenant doesn't get charged for it when they leave.

All of our services and charges are listed on a document on our website.

You should be able to get rid of that sign up fee of 3k and have only the monthly charge.

I'm about to start a team of callers on these lists, but I don't want to waste their time or my time with these dead leads.I'm thinking of charging back the expense with my credit card company because I'm pretty disappointed.Does anyone have any solutions they'd recommend for getting accurate property owner phone numbers?

Otherwise, if you're assuming third party management, then maintenance is either baked into their fee or charged hourly like a vendor. 

We don't charge any  up-front fees for this and it shouldn't be necessary, but do watch out for the upfront non-refundable "commitment fee" or "engagement fee."