I buy from HF a lot but only tools that I will use very little, things like one time use or once every couple of years use. I very seriously looked at that Plasma cutter but decided I would use it more than once a year and bought a Hypertherm 380 for about $200 more with shipping, yup my Hypertherm has been used WAY more than a one time and never regretted my decision.
The HF units USED to be built by HTP but not anymore, now a knockoff so they use HTP consumables, not your everyday standard consumable for when you run out on a Sunday afternoon, easy to find on the web but your local stores may not have the consumables.
I may be biased here but the best philosophy towards HF stuff is mine, ask yourself : How often am I going to use this "item" ? More than once or twice, go buy quality, once only then ask yourself : What will I break if the tool break while being used ? If its bones or me in any way, go buy quality, if its a car part that will be broken what is the cost of the part ? more than the quality tool ? As I said I buy from HF a lot but I certainly don't buy a lot of tools there.