the cheapest way to get into reloading is a: LEE PRECISION 90258 Classic Loader.357 Magnum $35.91 on Amazon
for press reloading:
Lee Reloading Press Md: 90045 29.99 https://www.amazon.com/Lee-Reloading...s%2C377&sr=8-1
LEE PRECISION 90100 Powder Measure Kit (dippers) 13.99 https://www.amazon.com/LEE-PRECISION...s%2C206&sr=8-7
Hornady Powder Funnel For 22-45 Caliber 5.99 https://www.amazon.com/Hornady-Powde...s%2C216&sr=8-8
LEE PRECISION .357 Magnum Carbide 3-Die Set (Silver) 34.99
then all you need is powder and projectiles.
Choosing from the 2 presses youre looking at I'd go with the classic turret press Kit 219.49 https://www.amazon.com/LEE-PRECISION...gateway&sr=8-1
everything to get started except the dies, powder and projectiles