I have two suggestions... One, it appears that where you excel is in making steak sauce.. So, why not just try to sell your steak sauce.. Or, if you are into the selling the steaks with the steak sauce, hire a chef and have him worry about cooking the steaks. This way you can concentrate on selling and making your sauce.
Or, get a thermapen and get an induction burner so you can monitor the temp accurately and a thermapen so you can get an exact temp on your steak.
I mean, you are going to need to cook a lot more than 30 steaks to get it down.. Buy 30 more steaks and write down everything you do. and keep tweaking until you have down the right times and set up.