Why on earth did you sell all your Legacy cards? There are typically more Legacy tournaments than Vintage in both San Diego and Europe, both of which you occupy, from my understanding.
I would recommend selling your Foils, if anything, and just get non-foil versions of all cards you would need, or like to have to compete in both formats. That seems like a better investment in your situation, as it would afford you the opportunity to play both formats.
What I sold was foils and promos and deck specific stuff. I still plan on playing legacy by playing combo, as I need almost nothing I don't already have to port my vintage deck to legacy. This allows me to play both formats and have the most money for vintage.