In some hospitals in the US, any time you're expected to be "bedridden" for more than a day they like to strap the blimp boots on you, and on top of being confied to the bunk you're additionally annoyed by the constant cycling of the pressure in places you'd really rather be able to scratch - on the pretense that you "might get bed sores from laying on your ass" for too long.
They probably are more appropriately used - and more likely to be helpful - for localized edema (as long as it's not in your neck).
I would doubt that the rig would be more expensive than the oxygen concentrator that I have or the CPAP that Lin supposedly needed, neither of which gets much use since we found out what the real problems were that caused the symptoms for which the "specialists" prescribed them for us.
The O2 concentrator was, in fact, prescribed for me as a "cure" for peripheral edema - for which it didn't help much at all.