When bringing up subject-to as an option, the agent kept stating that his loan was un-assumable and that there was nothing more outside of traditional financing that could be done.

It has separate power (zoned commercial) and the rate I pay is cheaper than the main house. 

I've been doing this for 20 years, and I still think buying existing properties is the best option.

Depending on what you are wanting long term the househack is a great option as well and depending on your situation you might be able to also keep your house in Salem and buy up here. 

Check in with @Joseph Chiofalo for some construction financing options.

My husband and I have narrowed down our options and I would love some feedback from all of you wonderful people.  

Unfortunately, the reality has been a cascade of disappointments, with the primary offender being the shockingly inadequate battery life.The promise of efficient power management proved hollow, as all 28 locks consistently suffered from rapid battery drain.

I really like the equation, though, because it does encourage/provide the idea that house hacking can truly increase your personal net worth and be a better option than for example  (having a relatively higher income in town A but you rent versus lower income in town B but you house hack -- the NWROI may tell you house hack in town B!

Lots of other EP options for building the box are available now.  

This might entail buying a single-family home with rental potential and living in one area while renting out the other units, or it could entail buying a multifamily property and living in one apartment while renting out the others.Financing Options: Look into traditional mortgages, FHA loans (for home hacking), and other inventive financing techniques.