Yeah, the inflation seems pretty crazy atm. There's a huge difference in price to the low, mid and high dps builds. Low builds will cost you under 10mil, mid builds are looking 100-200mil and the high is starting to step into the billions. It's pretty crazy.
My first buy is going to be a 2 socket Depth Diggers, which should help me make a bit more money, while giving me a dps boost to over 100k at the same time.
a one socket one with high strength is way cheaper and if I were you that would be part of my last upgrades since the pants slot usually is a very low dps boost slot, even with max strength it is still much lower than upgrading your weapons/amulet/rings/head/gloves
I dumped 90% of my funds into upgrading my weapon(s) and scraped for the rest.