Is there a reason your doctor wants you to use such an expensive machine, or does that $1200 include everything?
Here is the one I have. It has most of the bells and whistles - everything I need - $868.
REMstar Auto CPAP Machine and Humidifier (DS550HS) - CPAP Supplies, CPAP Machines, CPAP Masks, Sleep Apnea – easybreathe.com
Tube, mask, cushions, and headgear should cost about $200.
A problem I first had was understanding the lingo. I ordered "masks" when I really needed the "cushion" and ended up with a lot of expensive stuff I didn't need. The "cushion" is the thing that fits against your face. The "mask" is the thing that holds the cushion. The "headgear" is everything else that goes on your head. I find that the cushion tends to leak after its about a month old, everything else I have is now 8 months old. They say it should be replaced, but I clean it all every weekend and I don't see why I should replace it. I think they just want to sell more stuff.
I was really depressed when I was told I needed this thing. I was thinking, "If I'm that old, just shoot me now." Not a year into it now and I see it's worth the hassle and expense. Plus my wife says she likes sleeping with a fighter pilot.