Adding 2nd air, converting from 30 amp to 50 amp

Our rig came with 30 amp and no second AC prep. Since I may add one at a point in the future as well as some additional circuits now, I updated to a 50 amp service. Had to change distribution panels for both 110 and 12v since the OEM was combined, plus the cord and ends to have the 4 wire needed. Cost was less than $300 and about 7 hours of my time. I’ve got a pretty easy path of getting the wire to the vent in the bedroom if we add the AC. Good luck with yours.