This arrange that you will have will likely be a headache(major assumption on my part).First - Do not do business with a friend. 

Using a smaller bank or credit union is the way to go.Being that you have been in business for 10 years I am VERY surprised your business banker can't help you!

I was wondering how people managed to scale their businesses faster.

When you learn the business after a year or two you can either go out on your own or stay with them. 

.: Quote from @Chad Hale: I used QB when first starting my property management business.

Is there a point of contact person/business that handles all home investor concerns (general contractor, engineer, etc.)

Hello BP,The Producer Price Index (PPI) is a valuable metric to monitor, as it measures inflation from a business perspective (what businesses pay for services/goods) that isn't always reflected in the Consumer Price Index (CPI) or "inflation" which is commonly discussed in headlines and among other investors.

It’s off of a very busy road with lots of frontage and its own personal billboard on top of the building.I’m having a hard time figuring out what to do with the property, whereas it is more on the outskirts of town.

May negative cashflow until fixed.3) Buy established business: assuming you mean something other than real estate related.

We have helped several businesses open up using a Tiny Home to fit their business needs along with the City of St Louis with their homeless project.