Same here I also bought 4 for my ARB, but I recently bought another Jeep and there was a compressor build in with 2 hoses. I think that's the real sweetspot. Way less space and hassle. So I would always recommend 2 instead of 4 at least because that's easier and more fun to use.
to the details: I bought mine for 600 and in sale instead of 700 at quickflate - it comes with a digital gauge and it is a really good quality. (quickflate_uae on insta)