Of course, check out occupancy limits in the county/city that you choose.If you want the least amount of work but lowest cash flow (cover 50-80% of your mortgage payment), I recommend finding a house with a basement/mother-in-law apartment, and live upstairs and then rent out the basement to a long-term tenant.Denver metro has experience terrific appreciation like most metro markets, and over the last 40 years, Denver averages 5% appreciation, so Denver is a great bet long-term.I'm more than happy to discuss further if you have any questions.  

But unlike what Kyle said, the 1031 exchange now is limited to real estate only. 

Over 90% of large multifamily purchases are made through syndication.The parties at the forefront of a syndication deal include the sponsor (also referred to as the general partner, operator, or syndicator), the limited partners (or passive investors) and the property management team.

The differences generally are going to be with a NNN you own the whole property, the leases are longer, and there will be probably some limited interaction with the tenant annually and a lot around lease renewal time.  

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.