My mortgage will be roughly $1500/mo and at the current well below market rents I will not cover the mortgage, so they must be raised I am confident I could ask $1k/mo per unit or add an additional $70/week to the current rents, But i also want to try to find a way to remove the storage and garage bays from the tenants so I can rent them out and make additional income.

You are covered.

If you are thinking it's the money...Note that the hard money lending industry has that covered. 

However with 2 units being rented I am able to almost cover my costs. 

Of course there are some good podcasts that cover real estate, finance and economics that you find helpful.  

There are also a lot of fees and charges that are customary for one side or the other to pay, and if you have no representation, you don't know if you're being taken advantage of.

Can I raise potential May rent now or should I just cover that on an eviction letter. 

In NC, the easiest way to accomplish what you are looking to accomplish is to have a long enough DD period to cover your ability to vet your concerns.

I suspect you did not have representation when you went into this deal the time to  pull a preliminary title report is before doing it now is I bet going to show this seller owes money and he probably or maybe does not have the funds to clear the mortgage off of the property so he can deed it to you free and clear..

During this time, the markets have been pretty favorable and probably have covered up mistakes that would eliminate (or created negative) returns in a down or flat market.Really depends on the investor.