Seems a large majority of players are hating on crew skills, specifically crafting. I run into people frequently who have no money due to X skill taking all their money with no profits.
Im sitting at lv32, I dont spend money on gear that I will outlevel shortly, I have Artifice at 250, Arch at 255 & Treasure hunting at about 180. I bought an extra bagslot, speeder etc etc. the necessities. All this puts me at just a notch over 300k creds. Questing/spacemissions/GTN sales/random trades/GTNing all BoEs i find make well over 20k creds in a 2-3hour session. I guarantee thats the low end, too.
Everytime i play, im doing Arch/Treasure missions. Treasure gains small profits but its consistent, Arch costs do dig into.profits but I see it as needed. While questing, people often ask for mods, crystals etc., the demand seems way higher than the supply. Ive made countless parts for groups ive been in, sold a heavy amount of relics and parts on the GTN that more than cover the costs.
If you dont enjoy doing this, then yes, youre wasting your money. I cant speak about endgame crafting but I reckon there'll be a niche there needing to be filled as well. Not everything needs to be cut and dry to be fun, it is possible to make money, have fun and have a use as an Artificer :-p