Expensive and nice. Find a good mechanic who is recommended. You need good 12v power, HD windlass breaker, big hole cut into deck - make sure its reinforced (between deck and ceiling), battery cables run etc. Make sure engine is always started and alternator energised before lifting anchor as it draws lots of amps.
Is there room for the unit to be inside the cabin without banging your head on it? A few things to think about.
