We have a customer who's in a wheel chair who uses a saddle chair to use her HQ Avante'. It might work for you, too?
HQ has a sit down machine called the Sweet 16, but it's about $5,000. I believe the Bernina Q20 is around $16,000, as is the HQ Infinity. Where the Avante' is about $9,000.
Are you saying that you can buy the Bernina Q20 for $999 plus tax? Whoa! If something sounds too good to be true, it probably is.