Having built a couple of cruising barges and refurbed a few and travelled around France in a couple of them, think about adding in a secondary source of heat. There are several that run off diesel like Eberspacher or gas based ones that are more common in motorhomes. These allow you to direct the heat where you want it rather than rely on ambient heat from the main source. Also do not skimp on hull and other insulation. Life afloat is great as long as you are comfortable, mid winter in France moving a boat along for a client while sleeping in the Galley 'cos that's where the woodburner was takes some of the fun out of it.
Keep it fun and enjoy!
Rob.
Keep it fun and enjoy!
Rob.