The easiest way to generate income for lower levels (level 40 and under), is to buy a brass key and say hello to the shack just northwest of Varrock. Kill Cheap Runescape Gold (level 28) and collect the important Bones.
Collect as many as required, then sell them in World 1-3 for 400 to 420 gp each. When you have over 1,000 Big Bones a number of people may buy them for 500 gp each.
Should you ever desire to visit Castle Wars, there’s a cheaper way. When you head to Port Sarim there’s a ship to the south you can charter to Port Khazard for 1,000 gold or even more.
However, if you utilize 30 gp to visit to Rs 07 gold you’ll be able to charter another boat in opposition of the same Karamjan dock to Port Khazard.