Outboards are ok but no hot water and less battery charging, they will charge batteries but at a slower rate than a god alternator, bss regs are not that bad for an outboard really, any spare fuel must be in a drained fire resistant locker but that is the same for diesel and gas, if a portable tank is connected it can be anywhere as it's 'in use', have a spare portable tank on bayonet fittings and you can change over while running with no mess, there's far more bss regs about inboard with fixed tank wether petrol or diesel.
Gas fridges are a no-no with petrol (unless fully room sealed) but they are crap compared to a modern 12v compressor fridge anyway.
My old norman 25 had a 4 stroke mariner 9.9hp and it would keep my 2x 110Ah batteries good with compressor fridge running and also had a webasto heater, hot water was from a morco gas heater, I could do 2 weeks on that with no problems although I did do long days of running back then.
For a small weekender sized boat outboards are great, just makes stern on mooring tricky but not impossible.