The main disadvantage is the size. While this is also an advantage, the fact that everything has to fit in 750sf of space will be easier said than done. It is possible, my current apartment is smaller, but it only has one bedroom. The kitchen will be a small galley style kitchen. To maximize the living space, the ¾ bathroom will take up less space than a full bathroom but obviously will not have a bath tub. The elevator would open up to a public foyer which will have a door to enter the home. This allows for people to come up without having to come into the residence.