Well about stamina hungriness:

Phase 1:

Beginner - 10 stamina, 5 dumplings, 110 exp, bonus 12, 0 life crystals (0.5 dumplings/stamina, 11 exp/stamina)
Intermediate - 20 stamina, 10 dumplings, 170 exp, bonus 12, 0 life crystals (0.5 dumplings/stamina, 8.5 exp/stamina)
Advanced - 40 stamina, 20 dumplings, 260 exp, bonus 50, 2 life crystals (0.5 dumplings/stamina, 6.5 exp/stamina, 0.05 crystals/stamina)
Ultimate - 80 stamina, max 40 dumplings, 360 exp, bonus 80, 5 life crystals (max 0.5 dumplings/stamina, 4.5 exp/stamina, 0.0625 crystals/stamina)

Phase 2:

Beginner - 15 stamina, 9 dumplings, bonus 25 (0.6 dumplings/stamina)
Intermediate - 30 stamina, 18 dumplings, bonus 25 (0.6 dumplings/stamina)
Advanced - 50 stamina, 30 dumplings, bonus 50 (0.6 dumplings/stamina)
Ultimate - 80 stamina, 48 dumplings, bonus 80 (0.6 dumplings/stamina)
Bonus 25 - 25 stamina, 30 dumplings (1.2 dumplings/stamina)
Bonus 50 - 50 stamina, 55 dumplings (1.1 dumplings/stamina)
Bonus 80 - 80 stamina, 90 dumplings (1.125 dumplings/stamina)

If one assume 100% spawn for bonus stages then:

Beginner - 40 stamina, 39 dumplings (0.975 dumplings/stamina)
Intermediate - 55 stamina, 48 dumplings (0.87(27) dumplings/stamina)
Advanced - 100 stamina, 85 dumplings (0.85 dumplings/stamina)
Ultimate - 160 stamina, 138 dumplings (0.8625 dumplings/stamina)

If one assume 25% spawn for bonus stages then:

Beginner - 85 stamina, 66 dumplings (0.77647 dumplings/stamina)
Intermediate - 145 stamina, 102 dumplings (0.70345 dumplings/stamina)
Advanced - 250 stamina, 175 dumplings (0.7 dumplings/stamina)
Ultimate - 400 stamina, 282 dumplings (0.705 dumplings/stamina)

We need 2k dumplings for maxed girl, 4k for everything, so this event is kinda stamina hungry (especially compared to last one lol ).
4k/8k stamina needed assuming only phase 1 maps, minimum 2k05/4k1 stamina assuming only phase 2 maps and 100% bonus stage spawn rate (Beginner map).

7 days of just passive stamina regeneration is 3360 stamina.
7 days of 10 gathers per day with average 15 stamina per gather is 1050 stamina.
So phase one max dumplings we could farm with it is 2205.
Phase two max dumplings assuming worst ratio with 25% bonus stage spawn rate is 3087.
Aka event is fully doable, just limits how much other stuff we can do (like reissue if someone actually didn't even start it yet).