What to look at before buying a bed that saves space
You are buying blind on one figure, and you should know
it. It is the problem of the whole category: no maker
publishes how many litres its bed holds. Not one. In every other
section of this site we can tell you how much goes in; here we cannot,
because the number does not exist. We leave it empty rather than estimate
it, and if a seller quotes you a figure, ask where it came from.
Storage under the sleeper and a bed that disappears are
different purchases. A base that lifts uses the volume under a bed
you were going to have anyway, and it is the answer when the problem is
that your own room has no wardrobe. A bed that folds answers the other
question: where does a guest sleep when there is no guest room. Neither is
better; they solve opposite problems.
A lifting base needs room to lift. A side-opening base
needs clear floor down the side; a foot-opening one needs it at the end. In
a small bedroom, where the bed is usually against a wall or wedged between
two, that decides which one you can actually use. Measure both before
choosing.
And ask what it measures folded, because most will not
say. Most do not publish it, and a good one folds to around
10 cm. Where it is missing you are asked to guess whether it will fit your
cupboard. Where the figure is missing we mark the space score as approximate rather than invent the folded size, which would be a guess with a number on it.
A note on lifting bases. They hold more than any other kind of bed. But they are big and heavy, and the lifting mechanism depends on being assembled well: you build it once, in the room, and it does not move again.