I REALLLLYY wish i had youre problem im the polar oposite of it atm, and have posted on this forrum asking for ideas on how to handle it. 200 stacks to me isnt alot from what im used to shifting but for my 2 pennies prospect it all.
Change the way you look at ur market. Especially the way you view ur common gem cuts.
Rare gems for me have made over 250k of my money far outselling the amount if gems ive sold
Bold, runed, delicate scarlet rubys
Reckless, Potent monarch topaz
Soverign (pattern world drop), Glowing and shifting twilight opal
Rigid smooth and brilliant autums
These above cuts made 90 % of the money mentioned above every green gem i got i cut/vendored or sent to my 2nd alchy non trans specced to xmute.
Saronite ore in volume ur speaking about will net you roughly 110 blue gems from 200 stacks. the cheapest of them blue gems i mentioned above sells on my server for 17g so i class that as my income and 1/3 of ur outgoings will be covered by making rings and vending. If i was you tho 200 stacks is a nice starting off point. Send the cut gems and rings you create to a fresh alt so you can vend/sell on ah. And actually track how much money you make you will be suprised. But do that once so you know what you make then you can roughly estimate how much ur gonna make for next time