If your characters are reasonably well-developed, you can farm Bituitis (Mark Mission 7 I believe) in the Archaeopolis part of the Massif zone for the Bomb Core x5 mission reward. They have a very good EXP value, and Bituitus might drop (rarely) the Tedradic Crown or (very rarely) Tiara, which can be sold or upgraded then dismantled for other good stuff, including Hermes Sandals/Sprint Shoes.

Bituitus is close to the C'ieth Stone, and once you accept the mission the first time you have no other enemies to deal with. The battle itself takes 30 seconds to no more than a minute for a good party.

Conceivably you could upgrade every item in your inventory, in its original form, to its max level before leaving Chapter 11 with very few money issues and maybe a long evening of farming. You will have a problem affording the catalysts for the more evolved forms though, at least until the sidequest I believe Raistlin was alluding to. Do as many Mark missions as you can, dig up stuff with a Chocobo, and open every treasure sphere you see -- that will get you some catalysts for a few of the weapons or good accessories until then.