It's OK, but why return not possible in the same day? :)
250Km means 6-7 hours, so up-down 12-14 hours. So return should be possible I think. Also I was telling to run it tri-weekly, not everyday. Other 4 days it can run via your proposed route. Even you could do a 5 days- 2 days split instead of my proposed 4-3. However, thanks for considering my proposal, No issues. Cheers.