The regulars on this board who love their propane cooking systems have undoubtedly done A LOT of research with propane storage, installation and leakage alarms and installed their system accordingly. It is very possible and great, I'm sure, but not easy or something you should do casually.
If you are looking for a simple, easy and relatively safe cooking set-up I'd scrap both the propane and pressurized alcohol systems and go for UN-pressurized alcohol. It is very easy to cook with, boils water just about as fast as pressurized alcohol and there is no installation required beyond a safe place for the cooktop.
who is staring at the sea is already sailing a little