I would not consider a lens disassembly for internal cleaning.
I had a discussion with a camera tech, and he told me that disassembling a Nikon 80-200 f/4 manual focus zoom will require collimating the lens, to get the elements in the correct places. That would significantly add to the repair cost and make it not worth it, in his opinion, to do the repair. IOW he was talking me out of the repair.
Today you add the complexity of the AF mechanism to the issue.
It may be cheaper and affordable to do this in India, but not in the SF Bay Area of the US.