Why is that a problem? On my boat
I have also only space for one small bottle. I carry a spar one. One bottle of gas is enough for about 15 days, sometimes a bit more. That is about the same time that lasts my water
tankage so anyway it is time to go to a marina or port for supplies.
If one lives aboard permanently or cruise
places that can be a problem but that is not what the boat
was designed for. If that is the use you are going to give to the boat, some modifications will be needed.