I'm afraid it's to complicated to aswer your question in a few words, so only a few suggestions.
- if you know almost nothing, maybe start here:http://www.luminous-landscape.com/videos/tutorials/camera_to_print_and_screen.shtml
- I believe the dealer just thoughtlessly sold you a bunch of most expansive gear he had, that wasn't necessary needed for your work. Why not ask him for an on-site training or assistance?
- AFAIK The "Pro" version of Mirage software can create ICC profiles using Spectroproofer. If it's a basic version of Mirage, you need to use Epson software to read targets, and create profiles with ProfileMaker Packaging, which is a little bit more complicated. One could wonder why the dealer sold you Mirage AND ProfileMaker Packaging...
- hard to predict what's available in the place you live, but Epson Premium Luster is a good choice if it's priced reasonably. As for fine art papers, I'd get Hahnemuehle, Canson, Harman and Epson samples and ask my clients which they like most. Epson has a fancy DIGIgraphie programme, so you can also follow his suggestions regarding fine art papers:http://www.digigraphie.com/int/digigraphie-explained/technologies-and-materials.htm
- SP9900 wastes 5-6ml for PK<>MK swich, so it may fill the maintenance up a little bit quicker. I'd be more concerned about ink waste, but anyway you should plan your work to avoid frequent ink changes.
- you need Windows to use myepsonprinter