For most of these build you will want 26g and 28g as core wires, 34g/36/38g and 40g are the most common outer wraps...for more diversity in build options you will need to invest in some wires and I know most people cant afford everything so here are some of the best prices and deals for wire there is.
Kbee wire has great bundle deals and prices for 24g-30g (Cores)
LINK for SS bundle
LINK for N80 Lower/Mid Gauges Bundle,
Link for High Gauges Bundle
LINK for KA1 Bundle
Kingorchid
on Ebay has THEE Best Outerwrap prices to date...if you message him directly you can get 38g-50g in 1000ft spools for a discount (the gauges not listed in 1000ft)
250ft of .6 Ribbon
LINK
50ft of .5 Ribbon
LINK
100ft of .4 Ribbon
LINK
1000ft of 40g Kanthal D
LINK
1000ft of 38ft Kanthal D
LINK
1000ft of 46g Kanthal D
LINK