I would agree with much of what Dave says but would add the following. If you are only going to cruise Mexico until May, forget the airconditioner. You will hardly use it, and the attendant generator issues make this a no brainer.If you are going to stay through summer (more fun than you might think) well, it is another story. If you need a smaller generator for just this trip, get a good gasoline one. It is way easier to maintain and there is no installation. Figure out a good way to store it. Surely you can park a gasoline jerry jug on the back steps, outside of the hull. Store the generator empty, or get it a very good, airtight case. If you have been cruising the Channel Islands, you probably have a good idea of what your energy and water use are. And, if you are only coming down here for a few months, you will probably be moving around enough to go with your alternator. But, bear in mind that Mexico is also a great place for solar panels. You will get the best prices at Solar Electric Inc, in San Diego (their website is solarelectricinc.com, not to be confused with the much more expensive solarelectric.com.....ask for Mike or Scott). Both the PUR and Spectra watermakers have done very well down here, and PUR actually has a representative sailing around Mexico during the cruising season. Either way, install it and work out all the kinks before you leave. Absolutely install a Y-valve. There might be five pump-out docks in all of Mexico! I would also put a manual pump on your holding tank, which you will use from time to time. In my humble opinion, macerators are not worth the bother if you are seriously cruising. And, they certainly need to be backed up, or your holding tank will be! Make sure you have a good self-steering system. A windvane is very nice, an autopilot is a must. A really handy thing to have down here is a Ham/SSB radio. It is very easy to get your Ham license, these days, and you will be glad you have it. Both the Ham and SSB nets have good weather forecasts, the best being on a morning Ham net called the Chubasco Net. You can do email via your radio using either SailMail or Winlink. There are also a plethora of internet cafes in the cities, but you will be spending a fair bit of time in city-less anchorages, I would expect. Make sure your anchoring equipment and techniques are up to snuff. Staying in marinas in Mexico is the quickest way to blow the cruising budget as they are as expensive, or more so, than Southern California. I know...I manage one! And finally, you are looking forward to one heck of a fun trip. Mexico is a wonderful cruising ground, the people are wonderful and welcoming, and the cruisers are a real community.Your Hunter is totally up to the task. Don't let yourself get "stuck" in one place. But, above all, get your gear installed a tested EARLY. Every year, boats have their cruises ruined for the lack of a part that should have been installed or tested long before. There are a few good boatyards, and several good boat stores, but if the part you need is not in stock.............I will say, "I told you so!" Have a great trip.