I can recommend MATRI-X:
MATRI-X: Training
Within 12 months, Applied Colors will have a dye kit for detailers for under $500, including train-at-home DVDs. No heavy duty repairs (rips, tears, holes in leather), but you will learn to redye seats, redye plastic trim (buttons, door pulls, panels, cargo panels), redye dash boards, and fix scratches in plastic panels after about 5-6 hours of practice.