Craft meaning craft brewery supply? 500 pounds wouldn't be enough of almost anything. That's one 10 bbl batch of average-gravity beer.
11 suppliers is also a lot. I would consolidate to no more than 4-6 suppliers' products to have in inventory. You'll save a lot on shipping, especially when it comes to making up mixed pallets of specialties.
The biggies would be, in no particular order:
Domestic 2-row pale
Domestic 2-row pale ale
UK pale ale (Maris Otter, probably)
Domestic 6-row pale
Domestic Munich 1 and 2
Continental Munich 1 and 2
Full range of US crystals (10,20,40,60,80,120)
Several UK crystals (20,55,90,150)
Several continental crystals (CaraVienna, CaraMunich 1 and 2, Special B)
White wheat malt
…Wow, this is going to be a long list. Maybe someone else can take over.