I would say yes to getting a heavy duty
sewing machine. We recently bought one of the
Sailrite ones to bring with us when set sail. We upgraded since we had to do sail and
jib repairs, and the old one just couldn't punch through the thick layers.
We realize doing some sail
repairs will be tricky because of space, but being on a mid-40s
catamaran will help. Other intended uses would be for
clothing, cushion repairs, etc., even helping out other cruisers with projects!