There are many ways to get rich which are listed in wiki's in Walkthrough section specifically. Each run I use most of them as soon as I can.
First one is the Brothel Madame first quest that earns you 200 gold no prob. On the way to finish it you will encounter Ogre, which you better defeat to get 50 gold. If you're wearing any boots, you can also enter Ruins and scavenge there for money with Perception 5. Without boots you're gonna get screwed.
There's a quest of defeating Quetzal, which you can check with the link. It includes travelling to the end of first map and buying specific stuff, then returning all the way back, but it gives you 300 gold + stamina regeneration charm.
You can also travel further to Verdant Valley and find there 100 gold + gauntlet of Strength.
As you see, you can earn significant cache on your way, and after you buy all the armor you need and a weapon, you can buy yourself any number of food you may need, 600 for example.