i'm not sure about where you live but here you can't buy the large K size o2 bottle anymore you have to rent it. you can buy a botle owned by someone else and get it refilled. the K size bottles are the cheapest to get refilled for the amount you get. i have 3 K size and 3 Q size. i find the Q size is the easiest to move around on my wrecker unless i have a ton of cutting to do.
if i were you i would get a victor torch either of the 2 common styles. that way you can use whatever torch head, welding tip, or rosebud you need. and if you are never going to move it, def try to find a K size someone has for sale. just get a 100' hose and you'll never need to move it in your shop. then pick up a smaller bottle if you need to be on the move with it.
i would also consider using both propane for magority of cutting and still having a smaller acet tank for brazing/ welding/ heating. i would check into preowned tanks from a individual, most welding shops will let you switch sizes and you pay or will pay you difference.
