OH you lucky girl!
I use my Juki-TL98Q daily for hours at a time...just give her oil and keep lint out and she works like a dream...I use standard sewing machine oil with the long squirter. Standard needles, but I am experimenting with the new Schmetz Titanium needles and they really do last longer. I think I had this last one in the machine for over a week.
I don't have a frame...no room. But when I'm FM'ing I set my kitchen timer for 1 hour. It forces me to get up and get away from the machine...otherwise I'm a cripple the next day.