I need a PC (2x4090, 128GB RAM) that can process the maximum dataset in under one minute. Right now, it takes about an hour.
The AI is already operational, but it's currently working with a dataset that has limited price history detail.
That's a beefy PC alright. Are you saying that you'll host a demo or public test on your rig with this spec, or are you looking for a VPS/server that can grant you this spec for hosting the code?
Have you looked at the renting GPU platform that has been popping out lately? If I remember correctly some of them offer less than $1/hr for renting a single 4090, not sure about the rest of the specs though. You can probably order a custom plan, although I'm not sure they'll agree if you only require one machine. CMIIW.