In reply to the first question,there are several companies in Gauteng who can supply you with bulk feeding boilies,at around R60/kg.As said,have a look on Specimen style trade on FB.MCT,Teratech and Fuzion are a few that spring to mind.I have never used them as I prefer to roll my own bait.If you already have the necessary equipment and knowledge,it's definitely cheaper to roll your own,and much more rewarding to catch on your own bait.
@Barbelman.
The whole purpose of pre-baiting is to establish a safe,nutritious food source that the carp will eat with confidence,and will include in their daily patrol route in their search for food.It is definitely better to use a quality food source bait to achieve this effect.Like any animal,if a 'rubbish' bait is used,fish will only sample it once,and not eat it again.Shelf life boilies are always preserved in some way,I have never,ever used shelf life bait and I never will.Prebaiting with a quality food source bait is quite expensive,those kind of baits are normally R100+ per kilo.It's only worth it if your target is to catch seriously big fish,like 35lb plus.If your target is numbers of smaller fish,just feed lots of particles and use the same on the hair.