Personally, I Love Mining! So you could use the advantages of the Dungeons and The Coal Trucks. Have you done the Quest to get access to Miscellania and Ecteria? Once you have completed those quests, you can get quite good money from Managing your kingdom. You can also train Summoning so that when you are training you Prayer at the Glided altar or Mining at the LRC, you can carry more ores/bones with you. Its your choice! :D