Can I stop the Upgrading for Stadium

[Bluebird Hewitt]

Is there a way you can 'play the system' as such by either waiting, planning and upgrading the final part of the youth facility so you an get them when you want?

For example, if you want them at the beginning of a season, you begin to build on the 14th day of the season, wait the usual three days for it to be completed, it finishes on the 17th day of the season and then you wait the 12 days for the youth to come through. That will at least get you 2 youth players at the beginning of a season now and then.