So at 4400, average 10k per point is 44M or about $220, it is CERTAINLY cost inefficient to use PP for enchantment for items that are wizard enchantable. That being said, it's not my money to spend, so do what you like. On that note, you don't actually need 4400 PP, you need a 2000 and a 2400 block which may be easier to find separately. For example, for 4600 points I could take my 7x T5 SWCW knockout flaring morning star up to 8x, so there is a lot of competition in the range you are in at 4400, whereas most people (due to the inefficiency of PP enchanting low end plain gear) have no use of 2200 and may be more willing to sell them, plus you aren't competing with the whales (i'm no whale, but I would certainly fight you pretty hard if a 4400 block came up, wheras 2000ish mean nothing to me.
"Hi, my name is Ososis and I'm blaming my shitty life for being such a fragile, soy drinking, emotionally unstable loser. My triggers are: Red reputation, ANY mention of MacGuyver and being called a fragile, soy drinking, emotionally unstable loser."