I think maybe you need to slow down a little. You're talking about rocketing through DM and onto instructor by the end of the summer, and you don't know anything about equipment? How about your own equipment? Surely you must know a little about the stuff you dive yourself? Speaking candidly, I wouldn't want to take an OW course from a guy that rushed through so fast. I've been diving for 14 years, and am just getting into my DM now, and expect to remain a DM for a couple years before I jump into Instructor. Maybe you need to step back, take a breath, and re-evaluate the plan.