I've lived in a ~250sqft 1940's era wood train car for the past 9 years, with my wife and now a newborn. It is doable if you enjoy the constraints and how it affects your decision making. I live about 5 miles from Seattle in a very rich neighborhood (a few blocks from the Paul Allen estate) on a large piece of land that is set aside as a reserve, while most of my neighbors have 5000sqft houses. As long as you have amenities (washer, dryer, full kitchen, shower, dishwasher) like I do then it's not some sort of struggle, it's more a set of limits to optimize against.
My neighbors can't tell if I'm eclectic and rich or weird and poor. It's a good thing.
I'm guessing eccentric/eclectic and rich. Poor people don't make their lives harder than it already is. Also poor people don't live a few blocks from Paul Allen's estate.
I'm fascinated by this. I live near seattle as well, but quite a distance due to finding something affordable with any amount of land, but your setup seems ideal.
Small house to maintain, separation from neighbor, better commute. I'm curious how you came into this situation, and if you observe opportunities like this to have vanished since the 08 era? (You seem to have bought at the perfect time...)
Smaller doesn't always mean less overhead. Small enough (250sqft w/ 3 people probably hits that bar) and you're constantly moving things around and cleaning things to make space for something else.
If you've ever cooked in a tiny tiny kitchen, imagine that feeling spread throughout your entire home life.
Have you documented this somewhere online, and do you have pictures? Using an old train car sounds very interesting and unique! I'd enjoy reading more.
I imagine it'd be easier to do it in a place with a nice year-round climate and no mosquitoes. And you could put up some outdoor shade pretty easily if you have the space and not have it count against your indoor square footage, and effectively get a living room that you can use most of the time.
My neighbors can't tell if I'm eclectic and rich or weird and poor. It's a good thing.