I’ve opened a catalog to a unit I’d probaly go with.
Propane-oxygen Little Torch that uses 16.4 oz. Coleman
disposable tanks. Each tank provides up to 12 hrs. running time
with a No. 5 tip (much smaller than the tips you mentioned, but
using oxygen the flame is much hotter).
From the infrequency that I refill tanks (5lb propane and 20# oxygen)- that unit would probably be fine for less than production soldering- especially on gold. My only concern would be the regulators- minor fluctuations in pressure can be frustrating.
Richard D. Hamilton
Fabricated 14k, 18k, and platinum Jewelry
wax carving, modelmaking, jewelry photography