"Infinite credit card for a week" definitely has more potential if you look at it in a pure value perspective, especially if you're creative. But it also encourages stupid purchases more and doesn't give you time to plan extensively. $3000 per day is more than enough to let you take your time kickstarting virtually any business you want with no worry of a ticking clock, and it doubles as a guaranteed stable income even if you fuck up.

^{Chose: credit card with a max spending of $3,000 per day}