There is so much wrong in that paragraph, where do I start?
You only want to pick them up when its feeding time? Wrong, unless you want to get bit.
Feeding in the enclosure is fine and most people do it that way. That is seriously the biggest myth in the snake industry almost. I feed all my snakes in their enclosures and have NEVER been bitten.
Ball pythons are picky eaters to begin with and they are ambush hunters, picking them up and moving them a lot is a surefire way to get them to not eat.