The Verdict: Not eligible
Costa Rica does not sell citizenship, so a quick second passport is not available here. Investment buys residence, and residence reaches citizenship only after seven years (five for some nationalities).
Nothing in Articles 13 to 16 of the Constitution gives nationality for money. The only nationality granted by decision rather than time is honorary nationality voted by the Legislative Assembly, which nobody applies for.
The road from investment is temporary residence, permanent residence after three consecutive years, then naturalisation after seven years of official residence, or five for nationals of other Central American countries, Spain or Ibero-American countries by birth. It also needs Spanish and history exams and a written renunciation of your present nationality that only Spaniards are excused.
If residence in Costa Rica appeals in its own right, take this quiz again and choose residency.