If Anyone Can Help Me Put Atleast ONE Barrow

So I just recently got dragon boots and dragon gloves, both are nice and im happy with them but something I realy realy realy realy want are dragon legs! Today I dont have that kinda cash and I had to give up my ring of stone, so there's no way im selling my white RuneScape gold beret or even amulate of glory (t)! So far the only safe way I am aware of making 1mil is by collecting swamp toads and bringing them back to the bank in gnome village in which the magical tree and yew tree's are. Also I went into the ge and it stated 3200 swamp toads= 1mil and 500k.

Sad because it took me almost 2 hours for 300K from swamp toads maybe that was because the radio was on and I realy was dreaming, so today that legs are down 100k then they were im searching for a way simply to create 800k with no killing monsters. No collecting stuff in dangorus area's no barrows bro's because I just have 22 prayer. So its got to be somthing secure somthing were you dont lose your stuff somthing fit for me personally a lvl 69 cb. So for you to assist me here are my skills not all but anouth for one to recomend me somthing. 42 mage / 61 attack / 32 crafting / 42 fishing /50 woodcutting / 28 ranging / 60 def / 45 cooking.

My Power level is 85. I am planning for 90-95+, or possibly 99. I will only have members for about 50 more days. I'll play Old school runescape buy gold for about 3-5 hours a day while doing my homework, and was wondering exactly what monsters could possibly get me around 40k-60k experience an hour without having to concentrate much on my character while he's coaching. (Also called AFKing).