The real trick is the broad tip. If you can get an iron that will get up to around 700 degrees with a broad tip, it only needs to hold that temp for a few seconds to get the job done.

I use a Metcal MX500 soldering station with a 700* 5mm chisel tip. Like I said, a second or two and I use 12 gauge wires. A good budget soldering station can be had for a bit over $50, if you shop around. I'd check circuitspecialists.com first. If you don't mind spending a bit of money, check into the Hakko stations. IMO, the Metcal is the rolls royce of conventional stations, but it is pricey.