Sounds like you are doing your best to keep your child's biological father in his life. You should be commended for that. 35% of a month is a lot of time. You should be Happy that your ex cares enough about your child to want to spend this much time with him,
The question now should be how can you give your ex the same amount of time during the year, Are you willing to give him every weekend? Every school break or all summer?
If you go into court with a plan that still gives him the same amount of time in a year I feel it will be granted.