I just finished research on my new guns and i wanted to know how much mining i chould have to cover my upkeep and still build up credits.
The modules will be or the main ones at least. Heavy Thetacron Cannon x 8 Intra-D Collider x3, X-Manifold Detector - Mark III, Perfect Fermionic Armor x5, and Energy Nullifier - Mark III x4 Can anyone how tell me about how much i should have at rank 231.

It would help to put down what your upkeep is

My best guess is about 4k-5k to support that build. I have Heavy Thetas 8x, Perfect Sync 5x, Inverter Mk III 4x, Intra D Mk IV 3x and my mp/h is currently at 6.4k/h atm. Not good but it still supports my upkeep everyday.

He'd definitely need less, I would say probably 3.5k-4k MP/h as the bare minimum. Syncopateds and Inverters are an enormous increase in upkeep over Fermionics and Nullifiers (especially Nullifiers). So overall SirKill's estimate of 4-5k to be on top of your upkeep and make some credits is probably a good estimate.