I am using a turkey fryer, 8.5 or so gallon pot. I start boils with about 7.5 gallons of wort (beersmith says get 7.41 when I am doing a 90 minute boil). I have a thermometer in it, so while it's heating to a boil, I check periodically. When it hits about 205, I watch it like a hawk. I have a hand sprayer on a hose (dedicated and filtered in my case), but it is set on "mist" and I shoot it as the foam builds in short bursts. Eventually the boil will roll the foam back in and steady itself. Hops additions can cause a recurrence of foam, so I have the hose ready. I've had slight boilovers that were just some foam going over the edge when I got distracted and missed the 212 temp.
Super easy. Turkey fryer rig cost about $50, includes burner, stand, pot, lid, fryer parts that you can use for frying but aren't useful in brewing... you add the propane tank.
If you do this, get a burner stand that will hold a keggle in the future because you will want to upgrade eventually. I was a turkey fryer before I was a brewer, so I didn't do this and I am building an entire single tier system to move up to keggles, but would have LOVED to just pop one onto the stand in the mean time.