I've built a very successful business on Bio Sculpture and to be honest it is my preferred sysytem now for 98% of clients, enhanced or overlays, great on toes too!
130 colours which last 3 weeks on fingers, 6 at least, on toes....and clients just love the lasting shone and colour, but the flexibility to change at each appointment. The initial outlay is more than some other systems, but actually it is very reasonable to up keep, and it does mantain its prices in the market. My clients are happily paying £35 a set in an area which commands £20 tops for most L&P.
You do need to train direct with Bio, as they only sell to once once you are proficient in the use of the gel.
Give your local rep a call....for you probably Bio London 0845 - 644 8250 and get prices.