I have a question for the original poster If your husband bought a motorcycle just to ride around and enjoy, or if he bought a boat to go fishing, or even bought wood working tools, do you think he would consider "recouping the cost" of any of those items ? I honestly dont know why us (and I definitely include myself in this) have to justify the purchase of something that we will just enjoy. I have to work really hard to tell myself that it is ok to buy an expensive toy. It brings me joy and quite frankly that is justification enough.
I will suggest renting a machine before buying, make sure it is what you want. I dont believe long arms are easier per se, the issues are different. While not having to struggle with a small harp, getting it straight on the machine is a challenge in itself. Hope this helps.