Installation: (I own the game on Steam I don't know about other platforms.)

Documents/Rockstar Games/Red Dead Redemption 2/Profiles/[INSERT PROFILE HERE] 
Then place SRDR30005 there

Details:

All animals studied (even New-Austin's but excluding all possible horses), 
all camp upgrades and satchels completed.

No missions from Chapter 2 are completed but the ones required
to unlock the stables, and the camp ledger. You'll spawn at camp at 9am.

No random events or strangers talked to (Excluding 2-3 O'Driscolls who jumped me)

Satchel is full of ammo, player and horse consumables, and tonics. (Capped at 99)

Contribution box has $617.33 in it while Arthur has $1250.23.

Honor is more or less in the middle to suit either playstyle.

Every gun is unlocked and bought with rifling upgraded on them with 
cosmetics like varnish and carvings defaulted (Used XB36Hazard's Save Editor)

Every Challenge is completed and Legend of the East outfit is available for Arthur.
(There's a glitch where only the sharpshooter gunbelt is available from the trapper,
contact me if you have a fix.)

Whole map revealed.

Arthur's Wardrobe has been updated.

All Legendary Animals hunted (Except for 4-5 which can't be done till later)

Change Log:

1.0- Initial Release
1.1- Added High-end horses (Arabians & a Dutch Warmblood) to stables