Here is what I estimate the dust collection demands to be:
Powermatic 1285 Jointer 6 1000
Powermatic 209HH Planer 6 1000
SawStop ICS73230-52 4 350
Delta Cabinet Saw 4 350
Powermatic PM2244 Drum Sander 4 800
Jet Edge Sander 4 350
Bandsaw 2 100
Bandsaw 2 100
Bandsaw 4 400
Belt/disc Sander 4 350
Chop Saw? 3 200
Incra Router Table 3 200
Oscillating Spindle Sander 3 200
Lathe collection hood 4 400
Lathe collection hood 4 400
Lathe collection hood 4 400
Lathe collection hood 4 400
Total 7000
He wants to sell you a $10,000 dust collector.
edit: to clarify, above is the dust port size in inches and manufacturer recommended dust collection demand where I could find it.