As far as how to get the 5K, that's fairly easy as a youngling, as spiderling silks go for 10-12pp each in bazaar. You can sell bone chips, low, medium, and high quality pelts go for a nice price. Rat parts can be sold to vendor, to buy a couple of bazaar bags, and you can park in the bazaar when you are eating or sleeping.
That said, you do not have to do it that way.