The plans were approved and the Contractor sent me an invoice for the $7,000.

this was an invoice found when going thru a seller's maintenance and repairs records for the past couple years....and he wondered why he was desparate and motivated??

I talked to one plumber who saw the string of invoices at a place that he charged $120, that was then marked up to $180, which was then marked up to $260. 

Watch his invoicing going forward carefully so that he doesn't either try to recoup the loss from you through a side door or stick you out of anger because you won't replace his tools.3.

The tenant can log in to view a detailed tenant ledger, you can even create a paid invoice as needed for rent, utilities etc.

For example, if it's a maintenance issue and it hasn't been done or done to their satisfaction, I instruct them to send a certified letter and if it's not resolved within 3 days of the date of the letter, then they can hire their own maintenance tech and invoice me or the property manager for the expense.

Get invoice from cleaner and submit it to airbnb 3.

I would be walking the site as much as possible asking questions and reviewing invoices.

He has access to tons of sub-contractors who he bills for some of them and I can pay by check for those or others they send me their own invoices and I pay them directly.

Call a guy out, have him write on the invoice it was improperly repaired by an obviously unqualified person.