The "short kit" for a MEC will work on either a 600 or a Sizemaster. You can switch from 2.75 to 2.5" in seconds. I've switched from roll crimp to Hartin crimps for my 2.5". As to saving money, you will have to shoot A LOT to recoup the cost of equipment. I look at handloading much the same as fly tying, the pleasure of my handloads out performing factory stuff and the ability to load specific loads I can not buy. Handloading has always been a hobby in and of itself for me.

"Every one must believe in something, I believe I'll go hunting today."