What you're asking for, dual CPU or even more than one, it's not common among the regular/typical user. At this point, if you're looking for that much, you'd get a server and not a computer.

rent from cloud providers like amazon, they don't care what you run and will definitely not steal your secrets.

Also look if you can rewrite your solvers to use gpu's. That is 100% best course of action and even cheap gpu from 5 years ago will run miles ahead of top end cpu today

I meant that those who rent won't share their info of what they renting, not that providers going to steal info. I had considered it but seems like might cost as much to rent than just make something my own but idk.

On that second point what would that entail? Again I'm not the most savvy. Know a bit of python but far from being able to do much of anything lol

Yeah then forget second point maybe find a solver that already works on GPU. Unless RAM is the biggest problem.

And renting can be much cheaper - you can rent 1000 servers with 128 cores and 1tb ram each and pay for 5 minutes of use