You should get this by the end of Singapore, maybe earlier if you just fit the cheapest upgrades. The important thing is to not change teams until you have bought all parts as you lose resource points when you switch teams(Thanks to xJohnGalt117x for that on a different guide).
You get around 460-560 Resource Points per race if you:
Complete all 3 Practice programmes perfectly
Complete all team objectives
Take part in practice
Get Pole position
Win the race penalty free
Are the 1st Driver for your team
I get 460ish by only doing 2 Practice programmes perfectly.
*"Take part in practice" - If you complete all 3 programmes in Practice 1, advance to the next session(Practice 2). When P2 starts, advance to the next session(P3) straight away.(You do not need to leave the garage to "take part"). Then do the same in P3. You only get 10(11 with the career booster) Resource Points per session for this, but that does start to add up after a while