John, Ladies and Gentlemen, I would like to offer a few comments on boat and systems choice- 1-What you are willing to spend for a boat has a great impact on your choices.  Are you looking to go for a low purchase price and go used or buy new and pay more.  This depends upon your financial resources and your philosophy. 2-Long self sufficiency in quantities of fuel and black water storage are convenient and can be economic.  Fresh water tankage is less of an issue since a small reverse osmosis unit is inexpensive and very nice to have. 3-A washing machine is also very nice to have if you want ultimate flexibility.   4-I am an advocate of a large house battery bank with a large auxiliary alternator on the main engine to charge the batteries.  This also necessitates a large inverter/  5kva is a very nice size if you have the batteries and auxiliary alternator to support it. 5-Seriously consider a power catamaran for its living space, efficiency and ease of maneuverability with the main engines and no need for thrusters.  With my 47 ft Cat I can go 6 mph at 5 mpg or 25 mph at 1.5 mpg and everywhere in between.  Additionally, with its 18 ft beam the props are about 14 ft apart and make maneuvering with the main engines very easy. 6-Air conditioning for at least the sleeping quarters is essential.  Organized and designed properly this can be run on the batteries for one night and keep the peace and quiet in the neighborhood. 7-Select a design that protects the prop.  A really good design virtually eliminates (not quite)the possibility of damaging or fouling the prop when moving forward. 8-Look for small staterooms and large public spaces. 9-Choose a boat with boat an upper and lower helm.  You will enjoy the upper helm in good weather and the lower helm in bad weather and when there is a feud aboard you can choose the helm in the opposite location from the fuedee. 10-Have two heads.  When one fails it is not such a crisis. 11-But one shower is enough if you have better use for the second shower's space for me that was a washer/dryer and a wine cooler. 12-Try induction cooking ashore and decide if you like it. 13-Have a LPG gas grill and at least one burner outside in the cockpit.  Have at least one 110Voutlet in the cockpit at the cooking station for an induction burner or crockpot or whatever. Keeping the cooking fumes and moisture outside is often a good idea. 14-Use a combo microwave/convection oven in the galley.  Use whatever type of electric burner you like for the indoors.  LPG can be a quite nasty cooking source inside when it is cold and damp outside.  t makes a great deal of moisture when it burns. 15-Don't be afraid of using electricity for your inside cooking.  Much like Microwave or coffee/tea making is a high load for a short period of time or can be low loads like a crockpot for alonger period of time but can be easily managed without having to run a genset everytime you cook. 16-Ensure you have a couple nice and comfortable places to sit and relax. I could go on and on with my opinions but it is now midnight and time to go to bed.  Email me individually and I can explain what I went through on thiss quest which ended in me becoming philosophically attached to a new build design and moving forward that way with significant input on the mechanical and electrical design. All the best      Gary Hagstrom Crackerjack a Maine Cat P47 Iron River, Wisconsin