In answer to your last question, Lofberg, try this approach if you wish:
Here's a fairly quick way of making a fair bit of cash without having to do the same boring races again and again and again etc.
STAGE 1
Begin with 40, 000cr nestegg.
Then to enter the Amateur FR races buy a Z28 in a nice shade of green (colour optional

) . I fitted T2 tyres (10250cr), a Sports gearbox (5600cr), a Racing Flywheel (1000cr) and changed the oil (250cr) for a total cost of 39930 cr. i.e. a whole 70cr left in my pocket .
I'd better win then ... luckily I did giving a prize fund of 5070cr. Bought a Semi-Race Exhaust and paid some grease-monkeys to take out the extra seats and so on to lighten her up whilst I chatted with some of the lady spectators I'd impressed with my driving skills {"Yes, that's right, I'm a professional racing driver ... would you like to sit in my car?" {waves hand airily at garage, not realising he's pointing right at the pile of all the unwanted kit, including seats, the mechanics have just removed} }. Prize fund now at 1120cr after an expenditure of 3950cr.
With the Z28 thus modified, won Laguna Seca quite easily, gaining another 5000cr and upping the prize fund to 6120. Paid out 4700cr for an engine rebuild to improve power by thirty/fourty horses, leaving 1420cr rattling about in the tin. Had a fine race at R246 and took great pleasure in leaving the Nippon Siki brigade trailing in the Z28's wake on their home ground .
That added another 5000cr to the fund and the race organisers weren't very happy when I said that rather than some 'special edition' rice burner I'd take 125000cr in cash if they'd be so kind .
So the prize fund stands at 131420cr if I've added it up right. Time to sell the Z28. It's nearly new, only having done a grand total of 21 laps on three courses (84.7km), but the second hand market is brutal here it seems and I'm only offered 5707cr for it. I politely point out that it's had nearly 26000cr spent on it in the last three days but the buyers are unimpressed and, reluctantly, the sale is made.
Prize fund stands at 137127cr and I'm in the market for a new Merc as we speak .
Time for Stage 2 of the earning process.
STAGE 2
The Silver Arrows triptych of races is a natural for this step as I now have enough money to buy a rather splendid SLK 230 and spanner a few optional extras onto her.
From previous runs in the series (I've used it as a resource-gatherer before) I know that the most challenging race is the middle one as Super Speedway is decided more by the car than the driver . So I prep the Merc with that in mind.
T4 Tyres 16500cr) are the first thing on the list to provide higher grip in the fast corners. I back this up with a Stage 1 Weight Reduction (a snip at 1200cr) so that there's less mass trying to pull the car sideways through those same corners. To provide the necessary grunt to keep things rolling along, I buy a Stage 2 Turbo (13500cr), Semi Racing Exhaust (2900cr) and Sports ROM (1500cr) and put some high performance oil (250cr) in the sump. The final but important addition is a Racing Flywheel 1050cr) to help the revs spool up a little bit quicker through the somewhat sluggish gearbox. One performance based note is that the standard box, although slower to accelerate, is actually quicker overall at Super Speedway as it doesn't top out.
That's a total investment of 92210cr leaving me with a nice nest-egg of 44917cr.
I run the race and win handily after an initial battle as the superior power of the field reeled me in through the first corner - a spot of drafting and an early turn in for Corner 2 soon puts paid to any AI aspirations of victory .
20000cr richer, I head for Trial Mountain and realise that I should have used my knowledge of the series to add less kit and have done this race firsteasy win for another 20000cr.
Finally, Rome Reverse, the easiest race of the three in my opinion, despite (or maybe because of)the technical nature of the course. A very comfortable stroll with a winning margin of 3.5 seconds or so.
The prize fund ratchets up by 60000cr to 104917cr and I, extremely reluctantly, sell back the DTM to the organisers for 245000cr, giving a total of 349917cr
So there you go, six different races in two different cars and nearly 350000cr in the bank. Easy and not dull.
Hope that helps anyhow and a warm welcome to the Planet too.