Yes, yes and yes.
There's enough skill points in the game to level 4 crafts on one toon but it won't be until after you beat the main story at level 50 and you move into the VR ranks before you'll really start to rake in extra skill points.
Enchanting is by far the slowest craft to level (unless you have a grinding partner) so you should start early by deconstructing all and any glyphs you find.
Making your own glyphs is desired since you can make more powerful ones than what drops from mobs or is available from vendors.
If you don't mind leveling more than one character, you can split the crafting lines between them to ease the use of skill points per character and to have extra inventory slots for storage of mats.
I have 4 main toons and 4 storage mules ...
Yes, you'll be able to make better quality glyphs for your level and you don't have to spend any gold on them as the rune stones are free (if collected in the wild) ...But if you don't mind me asking, what's the primary benefit of levelling enchanting since you can already purchase glyphs from the vendor? Is it to make green/blue/purple runes?
Thanks for the advice guys. Looks like the consensus is that there will be enough skill points to level 4 crafting professions...!
Thanks for the advice guys. Looks like the consensus is that there will be enough skill points to level 4 crafting professions...!