Free: Contests & Raffles.
I run a RCBS rock chucker for all my rifle stuff and a Hornady Lock-n-load for all my pistol stuff. My RCBS is over 30 years old and still going strong. For the 7 mag I would just pick up a Rock chucker supreme kit and get started.
Rock Chucker press and Chargemaster 1500 powder despenser for the rifle loads.
Yep you start reloading because it's cheaper and pretty soon you have a closet full of premium components and tools. It's a natural progression.