If I had a ton of spare cash, I'd stump up for the Hudy complete system... USD$200+.
Cheaper systems exist; depending on your luck you could get a decent one that's pretty good. Most would be accurate enough for hobby purposes if you knew what you were doing.
Cheapest option is to buy a set of setup wheels and a bunch of protectors & set squaresetc. They still work, no joke - just takes a little bit more effort.
Some guys also tune by "weight distribution", they want all 4 wheels to bear the same amount (1/4) of weight each. They go buy four digital scales and glue them to a flat board then adjust their preloads until all 4 corners are equal tare.