A Pell Grant is a subsidy the U.S. federal government provides for students who need it to pay for college. Federal Pell Grants are limited to students with financial need, who have not earned their first bachelor's degree, or who are enrolled in certain post-baccalaureate programs, through participating institutions.
Oh... now see imho that is a horse of a different color there... It the roof ain't watertight... and stucco HAS to be done before the roof is made watertight then run the stucco first and hope it holds up. I am in an area where you very very seldom ever see a tile roof so nothing like that ever crossed my mind.
Make sure the roof structure is sound before you start. But first things first(I know you are keen to start installing roof shingles!), if you are building a shed from scratch make sure the shed frame is square and level before you begin your roof construction. Once all beams are in place, cover with 12 mm (~1/2) exterior-grade plywood sheathing.