50 Jewels from daily quests, every day. Almost 100 Jewels from the constant login bonuses. Most events reward 3k Jewels, for Union events that means really high ranking though. I'd say monthly Jewel income is about 13k-ish for veteran players. So 40k is "just" three months.
Still, what you can expect for 40k Jewels is... fuck all
But hey, that's pretty much the only way you CAN get SSR Hime, so I guess it's something!