Make a Rogue on the side; and Mug/Steal coin's from Toy Factory 2.
Myst cases are fairly good EXP for a Second class, and you'll be getting quite a few Cakes and Cookies.
What I did was Keep the Cakes to sell, and use the cookies. (Some people sell them, but They never sold well for me)
I'm not sure what the price of cakes are now; but when I did it they were around 2-2.5K or so. (Long time ago)
Although more guilds are starting to use condensed White pots for Woe; there are still quite a few that use cake;
so be sure to try and get a Merchant up two hours before woe.
Saders are Okay for Nif. You'll need to be a high enough level to survive, and actually collect your loots.
The plus side is that you won't need tons of MvP cards to make money there. However you probably will
go through quite a bit of Zeny. A Crusader is a very good starting character. Even if you don't have MvP cards,
you can still survive in most places. You can also still be useful for partying with other players, due to your heal,
and devotion skills.
Another thing you can do as a Sader; is to get a Brocca and kill Loli's. Gene made a post quite a while ago explaining
how it was done; but that post, and the old forums are long gone. I believe Holy Cross+Brocca pierces defense.
Since Loli's have quite a lot; it was supposed to take them down quite easily. I can't remember exactly what he said.
As a Thief, you can make quick money by running through the Ygg Tree, and Sealing, then killing the plants there.
You'll get a ton of Herbs, plus occasionally you'll find Ygg Seeds/Berries. These can be sold for quite a bit, and unfortunately
quite a few people who frequent PvP enjoy using them. So you should be able to make good money there.
With the Herbs, you go to a potion maker in some of the towns (There's one NPC in Alberta that I know of) and convert them
to potions, then sell them. It's time consuming; but you don't need to be a high level, or invest anything to do it.
I believe Razer covered it in his Money making guide someplace. It's a good tip for beginners.