My boat came with a 100% jib with jib hanks to hank it to the headstay. It was nearly immediately converted to a 150% roller furling genoa. As a result, I have an essentially new 100% jib that I'd like to use when it's blowing hard or when I'm sailing alone. Is it possible to convert a jib with Jib hanks to roller furling? Is it worth it?
Get some cost quotes first. First, what type of boat is it and how often do you go sailing? are you more daysailor, racer, cruiser? you can always furl down the bigger genny in a pinch - if you have foam luff then the shape isn't too bad for short term sailing. but if you are cruising over several days - then its worth the cost.
i would also try calling sailcare.com - they do conversions via mailorder. might be cheaper than your local loft - but then maybe not.
if the jib is essentially in new condition, and you do extended sailing - its worth paying the $ - don't bother with UV protection as you'll probably only use it occasionally.