Like how would I get enough money for the Infinite weapons and enough flashes and enough ammo for the Stryker could someone give a strat or an easy guide?

Do you know of any guide out there that might be helpful to

Personally i can do it in 2 runs of the game, you just have to pick up every treasure and buy as litlle as your comfortable with. Also don't overuse grenades.

I suggest to finish the game in Pro first, since you can have the PRL for free and do the whole second run with it and not waste any money.

Personally i can max at least one weapon to help me out on the first run(like the TMP or the Red9)

Sounds hard but it's not that complicated, in about 2x4hours you can do it no problem.