how much marinade time do I need for a low end steak

Zero. Besides salt,marinades don't penetrate any further than fractions of an inch under the surface of the meat. This is not my opinion,it's science. Look it up.

However,if you are cooking a thin steak,your marinade will taste like it has infused the meat since you're eating mostly the surface of the thin chicken on both sides.

Also..along with what June said..how are you going to prepare it?

It would be helpful if you could clarify what you mean by "low end steak."