Personal take on it.
~35 quests total, for something like 90m this wouldn't be too bad, roughly a little under 1m per quest. However, if does include stuff such as lunars, b gloves, desert treasure, and monkey madness.
The problem here is the prayer level is low which makes the quests I just listed, plus a handfull of other quests much more difficult.
In addition to that, I didn't go and calculate it at all, but will that get you the 170 qp for rfd?