I think he will strip the whole lens and clean every surface that is available to clean. I think some of the lens groups are sealed units and are cemented together and he won't deal with them. My worry is I pay £250 and get back a lens that looks similar as the fungus was in hard to reach parts. I've heard good things about the repairer recommended so I'm sure he will do all that is possible. That doesn't mean I will get a useable lens back though.
I'll make my mind up in the next few days but I'm inclined to sell the 100mm on ebay and keep the other two as they have very little evidence of fungus I can see and not enough to effect image quality that I will be able to see. I might get a UV light with the correct wavelength and then set up a cabinet to make sure it is all dead and combine that with some silica packets and make sure there is no moisture left.
They aren't lenses I would use very often and they were so cheap it was worth a gamble. I can always resell and I can't imagine making a loss given the money some spares and repairs goes for. The caps and hoods are probably worth around £100
second hand given the ludicrous price they are new.