i'm going to the ltt leather cleaning and restoration course next month, (if the wifes better)comes to about £400 for the 4 days (i think), its in leeds, sorry, harrogate. ive done the iicrc cleaning course but you come across alot of leather that can't be cleaned and needs restoration, i turn down 50% of my quotes due to this so thats why i'm doing the extra training, equipment is cheap so its all profit really, i charge £90 to clean a standard pigmented suite and get 7 out of 10 quotes, takes about 2 to 2 half hours to clean. and its very enjoyable work, totally different to cleaning fabric suites, its actually quite theraputic.
hope this helps
derek