Forza Horizon 4

There are two castles in the game. Both of them offer some benefits after they are bought:

1) Edinburgh Castle (15,000,000 CR): Alfa Romeo P3 and 10 Super Wheelspins - north-east side of the map, in the city.
2) Bamburgh Castle (10,000,000 CR): Barn Find Rumor and 10 Super Wheelspins - east coast, close to playground games.

Unless you are die hard supporter of Alfa Romeo I suggest you to buy Bamburgh Castle. Not only it is cheaper but also it gives you rumor which you'll need to get another achievement:

As you probably know their are two castles in the game, one costing 15 mil (Edinburgh Castle) and the other costing 10 mil (Bamburgh Castle).

A tip on making money, other than selling cars in the auction house, or just endlessly playing the game is to take advantage of credit payouts in specific cars skill tree.

Depending on what version you have or if youve got the DLC, All 7 Formula Drift cars are free in the auto show and also have a 300k payout that takes 19 skill points to reach per car, so if you’ve got 133 skill points lying around, there’s 2.1 mil right there to grab. If they are not free for you then The spreadsheet below contains a list of all cars you can buy that have credit rewards in their skill tree, with multiple cars allowing you to make a profit. And then obviously if youve gotten some of these cars already via the wheelspin youll be able to make a nice profit.

https://docs.google.com/spreadsheets/d/1l232oW9tvOxXmYNb610_...

(Not made by me, credit to u/lowjoker on reddit)

And this is a way to earn some money.

Let the cars and their perks work for you.

With only 19 skill points you can unlock 300.000 CR cash on all 7 Formula Drift cars.

So that is already 2.100.000 CR.

But it gets better.
This perk also has the Porsche 911 (991) GT 2 RS and even better the 1969 Nissan Fairlady Z.

Not sure if this was intended but it only costs 150.000 CR but it also has the 300.000 CR perk for 19 skill points.

Use it as long as you can.
To even maximize your win you can sell the car again for 83.000 CR in the Auction House and help others getting the car cheap and unlock this perk.

The Nissan R390 has also a very interessting perk and that car from this perk is also a way to make money.

I love it.
Only one million short of 10 million / my first castle 😁

Not really a solution but in order to help speed things up I would recommend getting the Forza Hub app. You get weekly cash gifts depending on your level which is calculated by certain stats throughout the entire Forza series. I'm at level 12 and I get 450k a week normally.

There are two castles in the game, but the most logical one to go after is Bamburgh Castle its only 10,000,000 CR, compared to Edinburgh Castle for 15,000,000 CR. Bamburgh Castle also has a required Barn Find Rumor when going for the Antique Restorer achievement, and its located next to an excellent spot to farm for skill points!

Update: If you own the Fortune Island DLC you you have access to 10 million fairly quickly by solving all ten riddles and collecting the treasure chests:


I have created some guides on how to boost credits that may help also to unlock it faster: