Looks like I have the new record.
7 DAYS!-Went with Honey/Boom Largos cause they give the most expensive plorts and because gardens > coops in food production. Water Slimes sounds like a good idea (since you do not need to purchase upgrades for ponds) but it takes too long to collect enough to outpace Honey/Boom Largos production
-Each corral had 15 Largos (more = hard to feed them all and TOO MANY EXPLOSIONS)
-Took 5 attempts (basically resets before day 3 to be more efficient)
-Got key within 1 hour (in-game clock) and Ignored all Tar and non Honey/Boom slimes.
-The market for Honey and Boom slimes ranged from 29-38 for me.
-Didn't bother with getting music/food dispenser upgrades for corrals, plus Tar scarecrow for garden.
-Did not build any silos, incinerator, or coops.
-Went for Open Range expansion first, then Cave.
-I never slept and I was never knocked out.
-I generally put food production ahead of slime number.
-Missed 2 gold slime opportunities cause I didn't have anything to shoot at them (spawned day 1 + 3).
-I only got health upgrades as a safety net just in case I took too much damage from explosions.
-I only had to re-plant each tree once (first two were another day off from needed a 2nd replanting).
Day by Day Things I Did Day 11st Slime Key Obtained
10 Honey/Boom Largos (1st corral had Tall and Plort Collector upgrade)
2 Mint Mango Trees (no upgrades)
Dash Boots Purchased
Day 230 Honey/Boom Largos (Added Air Net to 1st Corral, Built 2nd Corral with the 3 upgrades)
4 Mint Mango Trees (2 upgraded, 2 not upgraded)
Jetpack Purchased
Tank Booster I Purchased
Day 345 Honey/Boom Largos (3rd corral purchased and upgraded)
8 Mint Mango Trees (4 upgraded, 4 not upgraded)
Open Range Expansion Purchased
Heart Module & Power Core Purchased
Day 460 Honey/Boom Largos (corral 4-6 purchased and upgraded, 5th and 6th left vacant)
8 Mint Mango Trees (All upgraded)
Cave Expansion Purchased
Pulse Wave Purchased (Hoped doing this would speed up other upgrades appearing)
Started saving NB: 11086 at the end of the dayDay 575 Honey/Boom Largos (All corrals upgraded, 5 being used, 1 vacant)
13 Mint Mango Trees (All upgraded)
Tank Booster Mk II Purchased
Heart Module & Power Core Mk II Purchased
Saved NB: 33925 at the end of the dayDay 690 Honey/Boom Largos (All 6 corrals upgraded and used)
Saved NB: 66998 at the end of the dayDay 7Stayed at Ranch entire day (1st day doing so)
Wanted to purchase Tank Booster Mk III and Power Core MK III but I guess they come Day 8.
100000+ NB reached at 19:16Things I could have done to improve:
-First 2 days I fiddled outside the ranch a bit 2 much, could have been more efficient
-I could have ignored crates
-I could have skipped the Jetpack and Blast Wave upgrades
-I missed both Gold Slime spawns
-I could have done more slimes per corral but no idea if that would have been more efficient
Last ThoughtsIf executed perfectly + crazy good luck with market prices, before 12:00 on Day 7 possible
Sub 7 days looks impossible (unless someone makes a different super efficient strategy)
Selling large amounts of plorts is tedious, wish we could sell them in bulk