With the mortgage insurance added to the debt service, I do wonder how the math works. 

Not sure if I am posting in the right forum or not...but I have a plumbing question in a rental That I am renovating.

Patrick, I am by no means an expert but my first thought would be to confirm with county property appraiser what the PIN (parcel identification numbers) is described as and if it can be changed or separatedAlso, the tittle company who will provide insurance may be able to weigh in too.Bank or credit union may help with valuation question.

Plumbing and electrical changes have been made where needed as well as boiler and water heater updates to accommodate the extra tenants.

I would focus attention on what the actual rent would be.I think your taxes and insurance are way low.

It is better to get Umbrella Insurance than getting an LLC initially. 

seperate accounts seperate check books...)Isn t just getting General liability insurance sufficient to cover your liabilities ?

Looking for a great insurance agency at a reasonable price for 11 total units.

Deal with local real estate brokers who has insurance covering property management.

Since you didn't mention, I'll remind that you have to be a licensed real estate broker to do it and have an insurance, which is more complicated than your regular E&O insurance.This is a tough business and if you're doing just your properties, like 10-15, I'd really first thought it through before starting managing others in big volumes.