Purchased individually, each can costs something like $5 at REI (probably much cheaper elsewhere, they are overpriced at Amazon though) and lasts a surprisingly long time. For flexibility, I went with a BLUU Mount stove that will take propane, isobutane or butane. For safety, stick to butane or isobutane which can be stored at the lowest pressure of compatible fuels. I also picked up a Lindal Valve (see below) which gives me the ability to refill the cans as needed. Cheap butane fuel is available at local discount stores in my area for about $5 per 3-pack of 8oz "tall" cans which can be used to refill the short cans.
https://www.amazon.com/gp/product/B08NV7L6V6/