I installed a central vac in my Burro
(tongue planted firmly in cheek).
Found a 12-volt vac, hung it from the plumbing under the sink, made a hose outlet plus a switch near the floor, hardwired it, got a long enough hose from the local vac shop. Voila!
Less to drag out, quick to connect hose, MUCH quieter because of location. With the long hose the suction sucks, but it is enough to do the job, and being 12volt it is usable when boondocking
Thought about a 120v job, but this one will do. Pretty central though, with only one hose connection.