You can get an AirDNA paid subscription and check out ADR and Occ for similar units. 

I charge a leasing fee every time I place a new tenant, but I waive that leasing fee if I take more than 21 days to find a tenant.

You cannot charge one dime more nor a "pet fee" because service animals are NOT pets.If the applicant wants special features such as a wheel chair ramp, etc they MUST install that at THEIR expense and you can require them to bring the property back to its original configuration at the end of the lease at THEIR expense. 

Keep in mind you will also have to pay transfer taxes based on the properties assessed value, even if the property is transferred from your name to an LLC for a nominal amount + incur deed prep and recording fees.

AirBnB, Vrbo, etc want to make it seemless for renters to stay with you (for a fee).

Washington offered to trade his surveying fees for those parcels he considered ripe for development, and utilized any money he earned to do the same.  

Do you have any recommendations for lenders with low or no origination fees?

Plus, association fees can be very expensive.

Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.

P&I payment: $716Origination Fee: $4500Underwriting fee: $1395