Presuming all you're doing for alex is farming them, because the market is sooooo sparse, and presuming you're strictly doing SS or arra for guaranteed results (my average in those 2 areas is 125, cotton and linen factored in), 30000/125 = 240 days.
Thats not factoring in Captain and redoing all your assaults, which is 100 days presuming 100% success rate, though this can be done on the side while you're farming alex. But then you need your 150,000 tokens, which cant be done on the side as your assault since they both require tags. I'm not really sure how to calculate token reward for going more than 5 levels, its not on the wiki...lets just presume you're always given armband and you have never spent tokens getting in. 22,653 Tokens your first time around, because you needed to get your runic key (20 days), and you're still missing 1271347 tokens. At 1501 tokens rewarded per 95-100, thats an extra 85 days. So you're looking at ~200 days of assaulting as well.

Theres still einherjar ampoules as well...and the kings, but thats meh.


In that time you can build every emp and ~6 relics.