Russia does multiple large scale exercises an maneuvers each year. Russia also has a lot of basing nearby. For them, they're really only moving the units a few

Russia does multiple large scale exercises an maneuvers each year. Russia also has a lot of basing nearby. For them, they're really only moving the units a few dozen kilometers from already established bases. So for example, you mentioned a gallon per mile for a tank, which is indeed a realistic fuel consumption. The tanks are shipped by rail to nearby bases which is very shipped, and they then have maybe 200km to cover. 120 miles for 700 tanks is 84kGal of fuel, which is 420,000$ in fuel - that is, chump change. Aircraft don't even need to be relocated. They're already there. The rest, sure, but it's not as expensive as you'd think.