While that would be nice to build up a lot of money and save, however that would just push me back even further from starting my real estate future plans, careers, family, etc.

If you have to cancel on future Airbnb guests, so be it.

Pay a GC and take them with you on walk throughs.

Suggest you pester them with questions to learn the eviction process, so you can save money in the future.

@Dillon Clark-don't pay extra down on your mortgage-don't use a HELOC-save up as much as you can-hope this helps

@Kenneth Joseph Perfido It really comes down to math and future goals.

Sometimes they forget to tell you that many tenants in Detroit don't pay (depending on the property manager skill and the type of tenant) - but taxes are very high in the city and so is insurance. 

Work in a balance reduction if you pay it off early?

Keep in mind of the I/O(payments/period) and game plan on how fast you'd like to pay it down. 

@Jordyn Ohs Assuming your heloc is re-advanceable and the rate is higher than your mortgage, I would suggest you pay your HELOC down as quickly as possible with any cash flow from the properties.