I mean the time frame is a bit idealistic, but the idea isn't that far fetched.
Succeed or Fail, if Russia's military or economic power isn't utterly handicapped by this Invasion then they'll just sit back and bide their time while doubling down on the 'Get Sympathetic governments elected into our enemy's countries' tactic that's worked out remarkably well for them so far; then try another go at invasion.
Will this work? Probably not. Putin's not going to live forever and there are only so many rubes you can manipulate with cheap bribes and troll farms before you see diminishing returns on quality. Like the US in just a few short years went from a Russian Sympathetic Leader to a minority of congress that everyone else is very visibly getting fed up with.