There is only one "Responsible Broker" or "Managing Broker" per brokerage.

I am looking in Smyrna, GA area and I am more inclined to upgrade them as I will remodeling entire kitchen and hence do not want any trouble with load on the circuits.

It's easiest to work with STRs in your local area and can self manage at least at first.

Do they have expertise in renovations/management that you don't?

You can also obtain a DSCR second mortgage if you have trouble qualifying for a HELOC. 

If they caused you damages due to their violations of rules governing licensed brokers, you may be able to make a claim through the Real Estate Recovery Fund.2) either you or your attorney send an official termination of services letter (if you haven't already), wherein you need to demand that they remove listings, return to you your property they are holding, disburse your money to you by a date certain. 3) if they fail to comply with your demand, contact an attorney to prosecute the remedy.You can attempt to re-list your property yourself or with a new management company, but you may run into problems with listing websites when they see an existing listing for the same property.

I self manage my stuff, but its not hard to do it for 50-60 tenants...

Thanks for the suggestion.We are planning to self-manage our next property, so my preference is to live nearby.

What are the tasks that must be done by a property manager/owner versus someone who is assisting a PM/owner?

Will you get into trouble if you do it?