Originally Posted by
shouldberiding
Considering that you'd probably be paying a shop to do the work for you, it'll cost more in parts and labor than you paid for the bike in the first place. Likely just the parts would. The total cost of bike, parts, and labor would equal if not exceed that of a new bike depending on the model.
You'd be better off buying a different bike that is better suited to your needs.
From Niagara cycle works:
"
Shimano MF-HG40 Mega Range Freewheel 14-34T 7S Silver
14-34T
7S
Silver
Must be used with a Mega Range compatible rear derailleur.
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$15.20 "
Yeah, that's a real bank-breaker.