Edit: intro post with video was deleted. Inb4 there is a caveat.

I did it once and do not see any problems.

Background knowledge:

• Auto-walking is what lets you walk even after the game took away your control over Tommy. You do it with "W + F1".
• There is a call block zone around each asset buy pickup. You can use that fact to control when your call comes in.

1. Clear the replay buffer to get an F1 replay that starts inside the asset buy pickup.
2. Auto-walk.
3. When you have almost left the call block zone, buy it in the replay.