Power Rings - How do?

[Thaal Sinestro]

You can have anything you want, if you have enough OM. If you want to have all your powers from the start, there are plenty of RPGs that allow that. Nobody is forcing you to play in this 'exclusionary system'. It's what I made, I think it's pretty neat.

Well, I'm trying to think of a way to make this character but you're telling me that I can't do the things the character can do. I'd have to buy an infinite amount of 300 OM weapons to account for the fact that his ring can create things that LOOK differently.

If you were making Sinestro or any Green Lantern, how would you set them up? I'm totally open to suggestions here, but I'm being shot down at every turn with no answers being given.

EDIT: I'm willing to have him be a no-powers character as long as it takes for me to save up for me to afford the ring, and I'll pay literally anything for it.