Does it make you nobler because you're sacrificing income to do so?

You are most definitely sacrificing design quality since most GC don't care too much about esthetics and or quality of the Architecture.

this frees up 400+ of your 800 payment spend, without sacrificing much of the 100K2) buy a duplex to live in, put 25% down and live for free. 

If I control my own life, I may chose to sacrifice my priorities and tend to their needs, however if I have sold my time and mind, I may not have the freedom to make them a priority without sacrificing my standing with my employer.

Even if that means sacrificing some rent.

We we're thinking about possibly taking another step but this time we we're thinking of possible sacrificing our space and buying something managble for us to pay on and then rent our paid off home out.

I’ll do this comparison.By the property being “big enough” I meant that the yards are sizable all around, the house footprint could be enlarged without sacrificing much yard space.

I am currently 27 years old and working from home as an engineer, I make my own hours and like what I do as I sacrificed a lot in my early 20s, not going out and traveling to attain 10certifications in my field and allow me to be where I am today.

But the point pf this is I sacrificed and lived cheaply for many years so I could tackle my debts, save, and invest. 

Only thing I’m sacrificing is a higher interest rate by doing so.