Terrible idea, competing with 95% of bots for runite spawn? Runite already has tanked in prices. It takes a while to map out the timers for the worlds before you will get any significant amount.
I'd buy some rsgp, maybe 50m? It'd cost around 20 dollars which isn't a lot, and then I'd finish off 99 attack and hp which would take around 5-6 days.
Well my advice to you would be to buy some GP on here and then maybe do some merching or flipping with it to try and double your cash or something? You don`t need a lot to start infact I started wit just 100k and was on 7 mill by the end of the week thanks to me flipping every four hours on commonly used pvp items .
Good luck and if you need any more advice then just pm me .
Guessing you've got tokens leftover from 101dg? If so, use them to buy a ccb + ohCCB, and go kill dark beasts. They aren't bad cash as well as xp i've heard.