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 in
remote 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.