I too use hypertherm. I got the 30xp. It’s all you need for sealed units. I was gonna get a Hobart to start out but because of the discount at the welding place I go to the hypertherm was actually cheaper and better. The tips usually last me around 100 units or so before I replace them. They could go longer but it starts to really slow down around 100 units in. I run that and my compressor and grinder off a rigid 6.8kw generator. The torch line can also be spliced back together if you drop a unit on your line. With some of the cheaper plasmas like lincoln’s I found in the junk pile at work splicing the torch line back together would have been next to impossible. And yes I am running mine with a splice in it. That’s the only reason I know this.