The main issue with kits is that you are likely to end up with a quantity of materials and possibly some tools that are of no use to you at all, that suddently makes what tllos like a great value for money deal not so good, if you look on ebay you can get a perfectly functional entry level vice for a tenner, that leaves you 30 quid to buy materials and tools you want and will use, you csn shop around and buy from retailers that offer good value for money (i bought a bag of CDC recently, 2 grams a good quantity of feathers for the price i could buy 10 carded feathers at the only materials retailer in town)
I was fortunate in that i have family who have all tied for years, i was given hundreds of pounds worth of materials, i also started tying at the same time as a workmate, we tend to buy bulk packs and split them or if a nice saddle or neck shows up but it is expensive ( good quality cree, silver badgers, varients) we buy then and cut them in half.
I really enjoy tying, it adds a dimension to fishing you dont really get with other styles, and there is a certain little flush of pride you get from taking fish on your own creation.. it does get under your skin though, i am always looking out for stuff that can be used... the vinyl protectors that came on my new laptop have been saved for shellbacks, an antelope skin from the car boot sale, sally hansen nail varnish from the cheap toiletries place, cuticle scissors, clip in hair extensions... it goes on and on