Most property managers will include a limit of how much they can spend without Landlord approval.

Pick properties like that; example:  Great School Districts, geographical limitations (mountains, rivers, lakes), gated communities, etc. 

Thus far I have used the limited free searches on Rentometer as well as looking up rentals on Zillow to see what the market currently looks like in that area.

The 6 units are already rented with fresh 1 year leases as well that I have vetted and like.My question is whether I should reallocate my limited resources by selling some positions in the market to fund the 70k or seek a loan partner for the down stroke? 

This will essentially not be possible with new/multiple offer properties, so youll need to focus on properties that have been on the market awhile.Also note in Baltimore, your escrowed funds are always going to be high due to the high taxes...no way around that.Also keep in mind conventional loans limit closing help to 3%, VA to 4% and FHA to 6%.

Knob & Tube wiring for example, will likely, severely limit the standard markets that will insure the property. 

The lender you're talking to is obviously limited to conventional financing and you won't qualify there.  

@Kenneth LaVoie It’s actually one of those too good to be true things that actually are true -with some limits!!!

Why would you limit yourself to only purchasing turnkey properties? 

Occupancy Limitation - I'm pretty sure there is an occupancy limitation in Worcester.