You have your choices. You can say "I can't afford it" which is laughable from someone who spends over $50 for a bottle of wine, and hope that 10 years from now your wine is not over-matured, a dried out husk of what it could have been; You can say "I can't afford it" and live like you realize you can't afford it, IOW, since you can't afford a wine cellar don't buy wines that need cellaring; you can look at the situation realistically and find the money to take care of what you already own.
Home Depot is moving into the wine storage business - check their prices