No. DO NOT RUSH your guys to the majors. There are two exceptions:
1. They are aged 21 or over in their first year as a pro, in that case start them in HiA.
2. He is an absolute stud (86+ overall) and can immediately compete at higher minor league levels.
Best advice I can give is to hire coaches that fit your best prospects at that level. Sometimes you have to pay a little bit more, but at the minor league level, coaches are not paid that much.