Pretty, modern. Follows in the lines of trailer designs using a large door like a leanto for a very open feel. Little difficult to determine features. Can see DC power system, water, propane stove, reasonable windows, marginal storage.
$20,000 may or may not be reasonable depending on the materials and other features. After all, it is Europe and they want to make a profit.
Most people here are building at cost -- labor is free and no profit margin. Many build very austere TD. Start glamping and that changes a lot. Costs jump pretty quickly as you add space heaters, water systems, Li battery, high end fans, manufactured doors, AC, DC frig, propane, brakes, solar, axle-less suspension, entertainment eg TV/radio/VHF/UHF/HF. Now this system does not appear to have these and most likely does not as it is a major selling point.