First I'd like to state that Quadro is either an idiot for thinking 5 dung levels will take forever, or assumes the only way getting dung up is botting which does take forever (in which case, Quadro is still an idiot).
With your stats I would definitely recommend getting your Dung up, aside from the benefit of frosts you get the other rewards from Dung to top it off.
You didn't list your Summoning level, but I assume you can at least use a Spirit Terrorbird (hopefully a Tort?), which will help make your profit per hour go up.
Make sure you invest in a cannon. You might think "But that will eat into my profits" but in actuality, it increases your kills exponentially hence making your profits higher in the long run.
If you end up having any questions about actually doing Frosts, feel free to shoot me a PM. I camped Frosts for quite awhile after getting 100 Dung on my 138, so I should be able to help at least a bit.