An investor who 1. wouldn't have management charges, utility charges, routine maintenance charges, capex(for the most part) charges etc...

Might not affect how much you can charge per month but it will help you out with the refinance to pull all of your money out. 

And charge $500 for early termination fee's with no mention of recourse on lack/no-performance on their part?

You need a good source for local landlord tenant laws, a  reserve account for the unexpected, setup a payment tracking system, find a handyman, set expectations with your tenant about what constitutes a valid emergency, have the tenants sign a "walk through" list with photos of the condition of the house, make sure they have renter's insurance, 

Online forms for tenants, income and expense tracking, auto add late fees (or other charges you may have), rent collection, integration with other applications, ability to store documents, etc.   

Hey BP Community.I have been in the RE game for around 5 years and it's going really well.I own 5 properties that equal 9 units now that I rent out furnished and usually shorter term (1-4 months).I manage the places myself and charge pretty high rents since its shorter term and furnished.I pay for all utilities, and wifi etc. 

I had planned to send a warning letter to alert them that the next time they would be charged.

As a former banker, I would use the same bank for all of my accounts because most financial institutions use "account analysis" in assessing service charges. 

do they charge an admission fee?

@Ben MI have a guy that refinish tubs and showers and the most he has charged was 350 it is will worth it