*IMPORTANT*
A big shout out to Graphyx who mentioned in the comments that you need to make a save first before using the files within the mod archive otherwise the game will not register the save.

*Coming Soon*
Optional File 1 - Right before the mission "Take Me To Church", level 20, all available vehicle and weapon signature abilities, Jim Rob's venture completed.
Optional File 2 - Includes Optional File 1, plus all Discoveries completed.
Optional File 3 - Includes Optional File 1, plus all Side Hustles completed with bonus objectives (@tcha Side Hustles done at a one star rating).
Optional File 4 - Includes Optional File 1, plus all Shops completed, with everything bought from all of them

*Update Announcements*
I will shortly be working on more saves for the current version of this save, which means you can choose between just the Discoveries, just the Side Hustles or just the Shops. I will also be doing more saves for later on in the story, but these ones will come later.

A save right before the mission "Take Me To Church". All Discoveries, Shops and Side Hustles have been done, so apart from Threats, every district is complete. Every piece of clothing has been purchased, along with all the emotes and tattoos that are available during this early stage of the game. All currently unlocked weapons have been purchased with all upgrades and signature abilities purchased, apart from the MDI-50 Tac Shotgun, but that's because I haven't come across any Gatling Gunners this early on in the game. I have also done all current challenges apart from "The Collective", as that will be completed as you progress through the story.

The Side Hustles have been completed with all bonus objectives achieved, and the @tcha Reviews have all been done at a one star rating. All unlockable vehicles available this early have been unlocked, and the Jim Rob's venture has been completed, so you gain $2,000 an hour. As far as I am aware, I've managed to do all the vehicle challenges for every vehicle I have come across, however, I may have missed a couple. If I have missed any, please let me know.

The preset is the default Boss, with $64,259 in the bank. May not seem like much, but there really isn't all that much left to purchase at the moment. Unfortunately, the garage has a limited number of spaces, therefore not many vehicles have been brought in from off the streets in order to leave as much room as possible for you to save your favourite vehicles, although I have saved a few generic vehicles which I personally liked, or that I thought others may like as well. All vehicles in the garage have been upgraded with all three kits, and they all have their signature ability unlocked. Here's the list of all the vehicles stored in this save:

Ridgelord - Starter vehicle.
Adversary - Police tank. Generic vehicle, can be deleted.
Ant - Unlockable vehicle.
Ant 2 - Unlockable vehicle.
Ant 3 - Unlockable vehicle.
Attrazione - Jim Rob's venture unlock.
Attrazione 2 - High end vehicle. Generic vehicle, can be deleted.
Blaze - Fire truck. Generic vehicle, can be deleted.
Buffalo - RV. Generic vehicle, can be deleted.
Cheetah - Coach. Generic vehicle, can be deleted.
Diggum - Bulldozer. Generic vehicle, can be deleted.
Fer De Lance - High end vehicle. Generic vehicle, can be deleted.
Frying Dutchman - Unlockable vehicle.
Galahad - Found a police variant which I haven't seen elsewhere, so may be rare.
Heavyweight - Unlockable vehicle.
Hollywood - One of my personal favourites. Generic vehicle, can be deleted.
Idols Sandstorm - DLC Unlock.
Kenshin - High end motorbike. Generic vehicle, can be deleted.
Landbarge - Generic vehicle, can be deleted.
MDI-525C - Police APC. Generic vehicle, can be deleted.
Panteros Snake - DLC Unlock.
Peacemaker - Police Variant. Generic vehicle, can be deleted.
Potato - Unlockable vehicle.
Reaper - Hearse. Generic vehicle, can be deleted.
Responder - Ambulance. Generic vehicle, can be deleted.
Ride - Couldn't delete, so I'm assuming it was an unlock.
Saints Olive - DLC Unlock.
Sandstorm Elite - Dirt bike. Generic vehicle, can be deleted.
Sanicruiser - Garbage truck. Generic vehicle, can be deleted.
Sanicruiser 2 - Unlockable vehicle. Golden garbage truck. 
Schooner - Unlockable vehicle.
Shaft - Tow truck. Generic vehicle, can be deleted.
Shield - Unlockable vehicle.
Shield 2 - Police variant. Generic vehicle, can be deleted.
Shifty - Unlockable vehicle.
Skorpio - Off-road buggy. Generic vehicle, can be deleted.
Titan - Money truck. Generic vehicle, can be deleted.
Vigilance - Police variant. Generic vehicle, can be deleted.
Vigilance 2 - S.W.A.T variant. Generic vehicle, can be deleted.
Vindicator - Unlockable vehicle.
Vindicator 2 - Unlockable vehicle.
Widowmaker - Unlockable vehicle.