I currently have shorepower with an 8500 BTU cruisair unit. I recently purchased the boat and have used the AC twice while on shorepower. I thought the unit was rather big for the area it had to cool. My question is how small of a unit can I change out to in order to power it with a single Honda 2000 and still be able to run a couple outlets? The last owner ran it with a 3000 but that is too big, IMO, to place on the boat....and it would have to go on the hard top. Thanks.