I had a Hunter 280 for about 5 years. I sailed on Lake Michigan, but generally just day sailing.
I liked the rear birth…size was it was pretty large. And if you are solo, you could use a fair amount of that room for storage.
On the down side, the galley (on the H280) was pretty sparse as was storage in the galley. Mine was equipped with an icebox only (no refrigeration) and a 2-burner Origo alcohol stove. Many people love the Origo for its safety (non-pressurized). I didn’t think it burned very hot and could not be very finely adjusted. I prefer propane. But I imagine you could find some sort of fuel for the Origo in any part of the world. Origo is out of business now however.
On the H280, there was storage under the horseshoe settee. The water tank was in the bow leaving space under the main settee. My batteries were in part of the space, but the rest was open IIRC. That would probably be the best option for a water maker location. You may need to add more battery capacity in there too though. Plus solar controller equipment if you are going to be on the hook most of the time.
The water tank (40 gallons on both boats) and fuel tanks (20 gallons on both boats) is a bit small for cruising, but with a water maker, you can live with 40 gallons on water tank. Waste water tankage may be a bigger concern. I am not familiar with pumpout options in the Bahamas, or if you will get out on the ocean to legally dump waste. My 280 had a 20 gallon waste tank.
There is almost zero storage under the floor and in the bilges. The floor pan is very shallow and most floorboards are in one large piece.
The 290 is bigger than the H280, but not much…less than a foot longer overall, but about 1 foot wider at the beam..tankage about the same.
I pulled a few resources that compare the 2 boats, and some info on my H280 that I had for sale…
1996 Hunter 280 for sale in Chicago area. Currently in storage at East Chicago Marina.
wcwebs.net