There are 39 Gang Upgrades. They are listed here with money cost, and resources needed. Some upgrades require specific missions to be completed and/or have level restrictions.
All the
Swindler category upgrades (especially City Takeover, which gives discounts on other upgrades) and the Little Rooks upgrade will help you collect the necessary funds and resources more efficiently. You just have to remember to collect the funds from your train hideout. Also, the Loot Takedown and Scavenger I & II character skills help with resource gathering.
RINGLEADERRook Training I - 1000, 50 leather
Allies in Arms - 2500, 50 metal, 25 chemical
Training Rooks II - 10000, 100 metal, 50 silk
Enhanced Firepower - 6000, 100 metal, 75 chemical
Training Rooks III - 20000, 100 metal, 50 silk
Rook Riders I - 1500, 50 leather, 100 metal
Rook Riders II - 3000, 100 metal, 50 leather
Rook Carriage - 5000, 100 leather, 100 silk
Cavalry Call - 8000, 150 metal, 100 leather
Rook Watchers - 2000, 50 leather
Rook Brutes - 5000, 50 leather
Rook Enforcers - 8000, 100 metal, 50 silk
Carriage Sabotage - 4500, 50 metal, 50 chemical
Poison the Well - 5000, 50 chemical
Dull Blades - 3500, 50 leather, 25 silk
Bad Powder I - 4000, 100 metal, 50 chemical
Bad Powder II - 6000, 100 metal, 80 chemical
INSIDERPolice Bribes - 5000, 25 silk
Notoriety - 7500 (no resources needed)
Little Rooks - 1500, 100 metal, 50 chemical
Delivery Service - 1000, 50 leather, 25 silk
Explosive Delivery - 2000, 50 metal, 50 chemical
Growler Boom - 1500, 25 metal
Dispatcher - 1500 (no resources needed)
Medicine Market - automatic, given to you
Mad Science - 2500, 50 metal, 25 chemical (complete Breaking News - Seq 5 Mem 4)
SWINDLERCity-Wide Craze - 500, 50 metal, 50 chemical (complete Cable News - Seq 4 Mem 4)
Bomb Discount - 4500, 100 metal, 25 chemical
Black Market Affiliation - 3000, 50 metal, 50 chemical
Black Market Ties - 4000, 50 chemical
City Takeover - 10000, 50 chemical, 50 silk
Ale Heist - 1500, 50 chemical (complete Ned Wynert mission)
Shell Company - 5000, 25 silk, 25 chemical
Rate of Income - 8000, 25 silk, 25 chemical
Pub Investor - 6000, 150 leather, 50 chemical
Pub Games - 10000, 100 leather
Bookmaker - 12000, 100 leather, 50 silk
Tea Magnate - 15000, 50 metal, 50 chemical
Shop Investor - 20000, 100 metal, 100 silk
Money Making Tips
*** Spoiler - click to reveal ***Mikeyoligy says:
a nice place to grind easy money was the last fight club in Westminster. I needed about 4 more upgrades, and it gives £6000 for about 10 minutes work. Gets tedious after a few goes, but worth it to get over the line
Seeker74 says:
The many boat missions (Smuggler Ships (untimed) and Boat Raids (timed 2:30-3:30)) on the Thames are a very fast way to make money (maybe not as fast as Fight Clubs, but less tedious) once you've leveled up a bit (recommended for the area by the game is level 4). The enemies usually are below your level, but some are at the same level as you.
* thanks to
ImaginaryRuins,
Soragoo and
perceptron3000 for helpful comments.