Boxabl builds modular homes that unfold into their final form on-site. Their mission, which is to solve the national housing crisis, is admirable. To that end, they've just unveiled the Baby Box, a 120-square-foot home that will reportedly retail for $30,000. The Baby Box can be towed to the site by a pickup truck, according to the company's website. (Not sure why the animation shows a Tesla robocab.) They say one person can unfold the house in an hour, without using tools.There's a couple of things to note here. The flat roof is going to make this a no-go outside of places like Las Vegas, where the company is based; if your region gets any kind of regular rainfall or snow, a flat roof is asking for trouble. The second thing to note is that the house is not technically a house at all, but an RV. That is to say, in order to pass regulatory hurdles, the Baby Box is not built to the International Residential Code (IRC) but to the NFPA 1192, which covers recreational vehicles. This means the Baby Box will not be as durable as a conventional home, and it appears to lack wood framing altogether; the company says it's made with proprietary SIP panels and skinned inside and out with fiberglass.Because the house is technically an RV, it features waste tanks. If you're putting the house on a site with existing septic, or if you're paying to have a new septic system put in, you can run plumbing lines to the septic. If not, you'd have to regularly empty the tanks into a portable waste tank and transport that to a campground, RV park or truck stop that features a dump station. The house's water and electrical hook-ups are RV-style. If you're not planning to site the house in an RV park, you'd have to pay to have a well dug and connected. You'd also have to pay to have electrical run to the house. Alternatively, you could use an on-site water tank that you fill from somewhere, and go off-grid with a solar set-up. The cost of adding a septic system, electrical, and drilling a well obviously run into the tens of thousands of dollars. Ditto for having a permanent foundation added, if your region requires it. So potential buyers should first carefully consider the additional costs before being smitten by the $30,000 price tag.Here's a video tour of the house, which is going up for pre-order at a reduced price of $20,000: