With the amount of terminology regarding lines,float type,hook size etc,im actually struggling to find a cheap rig to buy a few of .Ready made rigs are usually designed for pole fishing, you’ll be using a “long line” on a whip, with a 4m whip you’ll need 3m of line, this allows for and 18” hooklength still bringing you 18” short of the whip length, this allows for the bend in the whip when swinging a fish to hand.
Ready made rigs also come with pole floats attached top and bottom, I prefer a small waggler or Drennan Stillwater blue attached bottom only. Really easy to make your own rigs and a lot cheaper too.
On the subject of line, through experience I found using light lines e.g. 3 to 4lb troublesome, the line often wrapped around the tip on casting, I now use a stiffer length of 8lb fluoro with a longer 24” hooklength that may vary between 2 and 4lb.
Wont be fishing any commercial places just yet,happy fishing simply for bits for a while,then ill try a longer pole eventually.One point to note if you fish a commercial with large carp in you may will get your line snapped
If you fish a commie try and find one with a silvers only pool