I don't like putting money in different buckets like that. Your total income is X, are you fine with adding Y to your expenses?
What good is retiring early if you need to pass up on the stuff you obviously enjoy? I'd mych rather work one more year than not enjoy my hobbies, within reason of course, and 1000$/winter is within reason imo.
If it gives you a reason to do additional hours, it's all the better.