I'll start this off by addressing the nutrients, and suggest (if you do not already have one) that you get a digital scale (0-500g) that has a 0.1g resolution. Having this item will allow you to buy certain items in larger quanities, better control their use.
Assuming you'll be making 5-8 5 gallon batches in a year:
1) I'd get 100g each of Go-Ferm, Fermaid-K, and DAP
2) 50g potassium bicarbonate
3) 6-8 oz hot-mix sparkolloid
Then get 1 Lb of potassium metabisulfite (KMETA, replaces Campden tablets), and a 16oz container of StarSan. If you dont' get a digital scale, then do not get the 1 lb of KMETA.
I would stay away from liquid yeasts, and recommend that you store your dry yeast (unopened) in a refrigerator (not the freezer area). Also, check the yeast expiration dates to ensure they will not expire within the next year.
Lastly, I'm not sure where you are located, but I know someone who lives in Japan that buys his brewing supplies yearly from US online stores. Have you checked to see whether that would work for you? Two stores come to mind: Austin Home Brew & More Beer & Wine.