I would start the year off with just adding a modest charger. After a season or two you will understand your needs better. Often you get caught up in buying toys for the new baby and much of what you buy the first year because it was "essential" never gets used. Better to do really necessary repairs than to spend on frivolous things. Not saying charging is frivolous but I have seen people spend a lot of money on a solar set up when thy get free electric at the dock just because they liked the sound of cruising . Better to find out what you really need. But some charging is important and you might find a charger somewhere on the boat since you do have shore power.