Fwiw, support from your local welding supply can be a huge benefit. Ask them what they recommend you get for your budget and if they can service them. Sometimes it's worth a few extra bucks to get a machine that is easy to get parts and accessories from the local guys.
Definitely true, so ESAB, MILLER or LINCOLN... I had a Diversion 180 not an IDEAL TIG but very simple to use. One knob one button either AC or DC, etc etc etc.. over $2000 and doesn't do what that AHP will do. I am a dyed in the wool MILLER fan... when I got my diversion I couldn't afford a Dynasty and I ALMOST got a Synchrowave 210.. but it was not really a "GREAT" machine either I still would take a Dynasty if I had a chance (Saw a TIG RUNNER kit with cooler, cart etc etc for $4k used... lightly and didn't have the scratch at the time) we got the AHP at the shop and I used it heavily for over 6 months getting to know it, then I bought my personal one... my Diversion freaked out and decided to start welding on its own, gas was off, Machine was OFF, suddenly fired the torch (it was laying on the welding table) Fried most of the boards in the machine, Miller replaced the machine... but not the pedal... the PEDAL was the issue on that box too... but the warranty on the pedal was 1 year, the machine 3... so now I have a box with no pedal... YAY!
Back to the business at hand, building a rapport with your LWS is advantageous in a lot of ways, you will have to buy GAS, and a BOTTLE (don't buy a new one it is useless just get one at the LWS and call it a day) I keep 2 80s of Argon, 2 of 75/25 and a 40 of each at home, I have 330s at the shop, You will need Tungsten, Filler metal, Cups, Collets, Gas Lenses, collet bodies, Back Shells (things get broken when you least expect it) consumables for your hood, Gloves, All that stuff... the LWS many times if you build a relationship (and you are gonna go through some gas learning!) sometimes they will give you a few samples of filler metal and tungsten to try out. get a good relationship built and you WILL get discounts on stuff. I buy Plasma Consumables there, I buy Gas, I buy Gloves I buy cups and so forth... I get really good deals there. I just e-mail my counterman and he puts the stuff back for me and I go by and pay with my personal card when I have time, or they bring it by the shop when they make a delivery.
I have started using Blue Demon Filler metal instead of harris lately so I get it online, I use Midwest Tungsten Service Tungsten... but Ck Collets, Collet bodies, Cups Lenses etc for the torch are best bought locally... Just get the damned 4 packs of cups and such they are CHEAP. get a compartmented Plano box from Wally world to sort your stuff, Use Wedge Collets, I use 3/32 Tungsten for everything I just sharpen differently... 2% Lanthanated, I use 3/32 Aluminum Filler for pretty much everything too, 5356 mostly but I keep 4043 on hand as well. 308L and 70S2 I keep 1/16 and 3/32....