The Magpies boss endured a frustrating transfer window at St James' Park and failed to bring in all of his targets to ensure he had the squad he desired to build on last season's mid-table finish.
As a result, Benitez is now considering which of his younger players he can afford to loan out, with some poised to remain on Tyneside to work with the first-team squad and provide back up when required.
The Spaniard told the Chronicle: 'When I was in the academy of Real Madrid I was desperate to go to the first-team training camp. When you are so close and you stay around, you will improve even more.
'If you don't get the chance to play in the first team you can still play with the Under-23s.
'You will be training with the first team, though. You will always have time afterwards to go out on loan.
'When you get this close, it is better to stay around.'
Benitez added that some players could still go out on loan, while those who stay put might have an opportunity in the January window.
However, he is keen for the likes of Sean Longstaff to remain with the Magpies at least until the new year.
He added: 'They will have time to go out and play in another division we can do it in January. I have had a conversation with Sean Longstaff and told him it's good for him to stay around.
'He is learning from Shelvey and Diame. He is learning from players who have quality and experience.'