Why inheriting two great-power fleets could bankrupt Spain

What happens if Spain inherits the French and German fleets in 1912?

Their upkeep would overwhelm Spain's budget and likely bankrupt the government.

The combined French and German fleets create a fiscal problem before a tactical one. Their operating and maintenance costs would far exceed the Spanish budget. Possession of hulls would therefore create liabilities without supplying the state capacity needed to keep them ready. The Spanish government would probably go bankrupt very quickly.