I'd have the PM send notice to the tenants that it was brought to the owners attention and they've waived the fee and thank you for being good tenants.

So that means even many years down the line, after I've dropped them completely, and I decide to sell my property - they're going to come after me and charge me a months rent because they didn't sell my property.WHAT SCUMBAGS!!! 

Quote from @Mary Jo Carruthers: Fees for buyers side has never been set in stone.

Tax free appreciation and rents significantly trump the loss of depreciation and custodial fees.

You can put your license in referral at most brokerages and pay no fees and still be able to do referral business.

If they are taking the risk of borrowing they would want to charge you a premium for the risk they are taking. 

It is very time consuming to get permit approvals and you may be in a position where you need to extend, pay fees, etc.. when your loan is past due.   

Setting up direct bookings is a great way to avoid platform fees!

Charge market rent. 

I had a local bank provide a 1031 without fees.