I think these folks that are cautioning against your potential purchase are well meaning but it’s really your choice. I don’t have a long arm but it’s clear to me through reading on this board that most of the people that have them seem to enjoy using them. Your description of yourself reads to me like you wouldn’t have any problems learning to use one. At that point, the question I would ask is: Am I going to make enough quilts for the purchase to be worth it? If the answer is yes, nothing should stop you!