Nice welder! looks like you already got some good advice but I'll throw in my 2 cents any way. I am assumeing that you bought a single phase welder because of the 60% duty cycle. 100 amps of power should be plenty. most home welders require about 50 amps to run correctly. make sure you have a 50 amp outlet with the correct size feed wire. I had my 200 amp welder temperarily hooked to a 30 amp breaker with 10 gauge wire right out of the box and it would kick off on the duty cycle after about 3 minutes of welding. now its hooked to a 50 amp breaker with six gauge wire about eighty feet from the box and I can weld all day with it.
sure does spin the meter though. good luck