For a while I really wanted a long arm - but no matter how many times I measured the room it just wasn't big enough - husband told me to take over the family room - but not enough light - then told me to take over the living room. That would work but then figured with 6 cats it just wasn't in the books - they would be shredding the batting, sleeping on the quilt that was mounted on the machine. Then we wouldn't have room when family visited. Even thought I could work for others to help pay for one - but really don't want to turn my hobby into a job. Finally decided the process I was trying to get around was the pinning - so now I have a friend help me and that is now a non=-issue. I'm learning how to quilt on my Bernina 830.
That said - you have to decide what will make you happy - a long arm will have a huge learning curve - which may be exactly what you are looking for. Just remember if you buy one get the best that you can afford - you won't regret it.