That being said, you could also pick an underdeveloped area of Southeast or Northeast DC and plant your flag.

@Neal Collins I work on Transformers. you know Autobots and deceptcons... jk Not the ones on power poles, I work on the big ones coming out of power plants.

@Harrison CookYour post kindles lots of questions.In the "good old-days" most heating systems were vastly oversized for the building they were heating - energy was relatively cheap, insulation was non-existant to poor ... so it was easier and safer to {drastically} oversize.Today, while energy {in North America}  is still relatively cheap for the moment,  we have a much better understanding of how to make buildings more efficient {though you might not think so looking at the construction industry in the U.S.A. and Canada}  and there are often more cost-effective measures than simply replacing an old, over-sized heating plant with a new, over-sized heating plant.You really need to - or at lease should -  perform a heat load analysis to properly size your heating system, a component of which, is determining the rate of heat loss of the building envelope.  

Give us the answers to the questions that @Michael Plante asked and we could better help. 

@Michael Plante Check with the mobile home dealerships in the area as well as your local manufactured housing association.

I installed big windows in each room, did tape n bed, texture, trim (with panels), AND INSTALLED 12MM LAMINATE FLOOR, all for only 3k in labor cost (I was honestly broke and low priced hoping he would throw me bonus money at the end).

He was a self-taught engineer who founded a company that built plywood plants all over the US. 

Working class neighborhood next to a plant or factory, maybe? 

@Michael Plante I think there's a couple possible reasons for the scenario you described (which I agree does happen frequently)

As for busy streets, consider a fence or planting’s to create a break.