Yea, so you save up your 30-50 mil. Know how far that gets you? That's 30-50 dust. It's 84 dusts (84 mil) to go from level 50 to 101.
Do you know how long you have to mine to make that much money? A low remort will make crap money from mining. Even for a god mining doesn't get really worthwhile until over level 400. Up until then, you make more cash collecting claymores.
So say you sit in Ubers and collect clays for a few hours. Say, 100 clays per remort. That's a pretty high number considering how other players are trying to do the same thing. That comes out to 2.7 million, at max haggle. Max haggle isn't something most low rls have, it takes time to train it, or a lot of sp.
Just looking at the amount of time you spend getting the money to buy the dust, it's faster just to work your way through the crowded zones. Even if you get the dust you need, it'll work for a remort or two before you need to do it again.
Leave the dusting to maxing out gods and people who want to waste their time maxing out before they're god. Most of those latter only do it to cause trouble for others on the server.