It's doable to use a local account, you just have to be persistent. See my post up this chain.
And Beep, in so far as Linux is concerned, there is an Ubuntu build JUST FOR AUDIO GEEKS!!
http://ubuntustudio.org/tour/audio/ I've only made a couple of recordings with it. My RME works in Class Compliant mode and it enables me to use my work laptop, booted to $100 removable hard disk, to make recordings and practice. That way, when I travel with my family, I don't have to take 2 laptops plus a guitar. My electric, a short cable, RME and work laptop are sufficient to have plenty much DAW fun!
It also means that since work keeps me in a current laptop, I no longer need to buy a laptop for myself. I just plug my removable drive into my work laptop and boot to it. It couldn't be easier!
And at home, I still use Windows for Sonar, but when I'm in the living room, I'm on my work laptop booted to Linux. Small, light laptop with a battery that never quits. I don't charge it until the next day at work.