Quite a few options and I’ve used most (all?) of them over the years. The choice boils (sorry 😆 ) down a compromise between weight, volume and ease of use.
Gas stoves are convenient, quick and clean but require a substantial canister for the fuel which you have to dispose of. The canister also adds a bit of weight to the overall system. Easy to adjust the heat output for simmering.
Meths stoves are less efficient (due to the fuel) so you need more weight of fuel to provide the same overall heat output. Because of this they tend to be a bit slower than gas. If you don’t get the ventilation right then they can be a bit sooty. Not too easy to get to simmer though this isn’t as big a problem due to the lower heat output.
Petrol stoves are a bomb waiting to go off! Need a bit of effort to get going but when they are then they boil things really quickly. Not too hard to get them to simmer. Tend to be bulky and heavy and best suited to expedition type work.
For your situation I’d get a gas stove and use a 100g canister unless you are looking at really counting the grammes. On a mountain marathon running event we had that setup and we ran out of tea bags before the gas ran out! So 100g did our evening meal and about 8 brews for two people.