My 20' boat is almost always the smallest liveaboard wherever I go but it is set up sweet-woodstove,12v and kerosene lights,portapotty(no thru hull for pumpout toilet). Nice and simple and legal too.
Wecome, hamikman! That does sound sweet. What kind of woodstove are you using?
For people who are learning, wood is the driest heat source you can have on a boat. This is important because living aboard=wet and moldy unless you fight it. Nothing ever dries on its own on a boat and the humidity on the water is usually 100% so even if your bilges are bone dry, all the moisture from your cooking, breathing and sweating will soon soak everything in the cabin. Mold and rot follows.
Heat sources in order from driest to wettest:
Woodstove--it's amazing how much moisture it can suck out of the air. You ought to learn something about basic firefighting and CO2 poisoning, but you should do that anyway. If you can avoid driftwood, it's better. The salt will corrode your stove and pipe over time.
Diesel stove--pretty good, but they're expensive and take a lot of tinkering.
Electric--neutral as far as drying. Only works at a marina with good shorepower, which usually means it's hot for electolysis (eating your zincs and thruhull fittings).
Propane--Bad. Makes water vapor when it burns, so it will actually rain inside a small cabin. Also, propane is heavier than air, so it sinks and collects in the bilges, where it can go BOOM at inconvenient times. Compressed natural gas (CNG) is just as wet, but at least it won't blow you up. It's hard to find though.
Added: Always have a fire extinguiser in a handy place near the exit. [Also note: NOTHING pisses off a marina against liveaboards like having safety equipment disappear!]