Getting into reloading is a lot like getting into shooting. A mentor is a great plus. If you have a buddy that's into reloading, get him to show you what its all about.
I have two 650s but still use my single stage press a lot for working up loads and small batches of hunting and specialty ammo. I don't think you need to spend a lot of money on the single stage press as you will want to go with a progressive as you shoot more. Since budget is a concern, I would start with the Lee Challenger Breech Lock Single Stage Press Kit (about $105). This has almost everything you need to get started including a quick swap method for the dies. The scale sucks but you will need to buy a good one anyway ( BE has a package deal for digital scale and caliper in the store). This will also get you grounded on what goes on in the reloading business. You can buy the lee kit, the digital scale and calipers, a couple of loading manuals, loading blocks and dies for all your calibers for under $500.
When you are shooting enough to justify that progressive, BE gives you a lot of info to help decide which press to buy. If you think you want a casefeeder and may want to load rifle, go straight to the 650.