Keep the money and use for repairs later. If you are worried about leaks the Flir Moisture meter is $600 and makes it easy to find leaks, drafts, rot. Has a Thermal Camera. If anything shows up bring it somewhere to see if its a problem.
They tried to charge me $15,000 for a warranty on a new rv that costs me $60,000. Aside from the price for the parts many times the wait for repairs can be VERY long and if you are handy you may just fix yourself anyway.
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