As far as volume is concerned, for 5 or 6 months - not too many. however, for the other months, a whole bunch!! My druthers lean toward landscape and nature photography. That said, I do get tagged on occasion for stuff like wedding photos and candids at banquets and gatherings.
I guess you could say I am an "advanced amateur", whatever that means. I have looked over Lightroom, and I honestly cannot see what it brings to the party that I don't already have with the lineup I listed already.
Not that your initial list has any questionable programs, but Lightroom would offer you a simplified workflow as it could fully or partially replace all six programs, depedning on your needs. You might want to play around with your proposed line-up and with Lightroom for a while before making a final decision.