Any unusual or one-off traits that seem "unique", "fun", "quirky" etc tend to do very badly in the actual real estate market. Often, they are poorly engineered

Any unusual or one-off traits that seem "unique", "fun", "quirky" etc tend to do very badly in the actual real estate market. Often, they are poorly engineered and will be a maintenance nightmare in 20 years. Inspection expertise to be able to tell whether it will be a maintenance nightmare will be very tough to find. Most sane buyers will just pass on it rather then try to sort it out. Even if the market is super hot right now and it seems like people will buy anything, anyone who looks at buying this will definitely be thinking about how hard it will be to sell in 10 years when the market isn't so hot. Most likely 90% of them will either back out or demand discounts that basically assume the whole thing is a mess and will need to be ripped out by professional contractors.