Play the lottery, that's the best way to gain money.
Also in Chris chapter 2, there's going to be a part where you're in Iksay village, and you have to go north to a windmill. Don't go north, keep trying to go South and you'll get infinite battles. Sure, you get infinite battles at any dungeon, but not all battles give you as much skill points and potch as this set, so take advantage.
Remember, potch is important only for the first three chapters... You don't want to finish your chapter three's, having 999,999 potch for each of your trinity character's.
Always take time at every village stop, to fight outside and gain some potch and skill points.
The trick to the lottery = Buy 5 random tickets and 5 sequential tickets, go battle for 10 minutes, come back to where the ticket booth is, but save at the inn. Go to the ticket booth and keep soft resetting until you get the 2nd place prize. Once you get second place, you'll have enough potch.
Only upgrade the skills that the character is good at, unless you really get upset with their weakness and absolutely HAVE to fix it. For example... Chris is really good at battle. She's a really good swordsman, but really lacks in magic or defense. She can parry and deflect hits, but she moves really slow. Even with a B rating on swing, she only seldom gets 2 hits in at one turn. The way you can change this, is by giving her Holy Dash, but she's not too good with that. It took me nearly 800 skill points just to get that skill up.
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