Income Late fee Gross rent Expenses Advertising Cleaning Gardening/lawn mowing Insurance Interest on loan(s) property tax Legal expenses Pest control Property agent fees/commission Repairs and maintenance Water charges Electric Bill Total expenses Net rental income or (loss)

Also, you may charge a premium on the rent (higher rent) in this model of leasing.If you charge them a higher upfront option fee, it will demonstrate that the buyer is committed reduce the likelihood of default.

First my units are  managed by a local company that charge me between 8% and 10% monthly.

If you get a red card, you can not proceed.

Do research on what inside vs outside protection means, and charging orders.

If it's during office hours, they can pick up a spare key for no charge.

I see 3 days ago a charge for a whopping $390 was charged from BiggerPockets to my card.

If no other landlords in the area charge for heat, you'll probably have a tough time.

Maybe they’re charging over market or could find a buyer. 

In that case you will have to charge them in addition to the fees that are collected with Airbnb.