The resale value here seems like the big issue to me. It may be well and good to live in a tiny house when you’re young. But tiny houses are not equipped for seniors. They’ll get a lot more cramped with children. And if you should become injured and need a wheelchair or other assistance to get around, good luck living in a tiny house.
I can’t imagine anyone living in a tiny house for decades. And if that’s true, why splash out $25,000+ on something that will sell for much less in the future. You might as well just rent, or buy a house that will probably have a decent retail value if and when you decide to sell it.