I got my machine the day the Dr. read the results. Conveniently, the sleep doctor sells CPAP machines -- which still bothers me. Been using it 14 years.
When we went looking for a TT last winter just about all the units had a shelf and plug on each side of the bed - dealers told us they do this because so many of the Baby Boomers that are buying RV's use the CPAP.
I don't see why you could not put it on the floor if the hose is long enough. Only problem with a long hose would be more opportunity for the moisture to condense out into the hose if you are using a humidifier......and you will be.
As to power, I researched a converter for mine and then discovered that most CPAP's run on 12V power anyway. You probably have a black box between the 120V plug and the unit --- that converts 120V to 12V. I got on the internet and found a 12V power cord for my CPAP machine that replaces the 120 volt cord. The catch is that very few humidifiers will run on 12volts - I think it takes just too much power. I just turn the power off to the humidifier and put water in it and let it evaporate naturally while we are camping - I can make it that long.
Try to stick with the mask - it will save your life, or at least extend it significantly. The key is to tinker with it until you have all the air leaks fixed. In 14 years I think I've missed maybe 5 nights total without it.
Good luck
