Easy/cheap: Hunter Woodcutting Fishing Mining Agility Thieving Melee Cost basically nothing, and the materials gotten pay for the tools. Easy: Fletching Cooking Both require some cash to start it, but when you've started, you can get a pretty good 150k+ xp per hour in both FAST!/expensive skills: Herblore Construction Prayer Smithing Firemaking Require a lot of cash to start, but are very fast when you have cash. Hard skills: Slayer Runecrafting Farming Are moderately slow to train even with infinite money.