Despite speculation and rumors to the contrary, it appears that financing for the new Vegas baseball stadium is a done deal. Documents submitted to the Las Vegas Stadium Authority seem to confirm that the financing for the A’s ballpark on the former Tropicana site is fully secured, with the total costs rising from $1.5 billion to $1.75 billion. For those unfamiliar with the A’s potential move to Las Vegas, here’s a brief overview: The team is expected to relocate from Oakland to Las Vegas, but they still need a venue. Up until now, details on financing for the new Vegas…