It would be inappropriate to feature priests as "stars" of a show, most especially because the priest has the real work of his vocation to attend to. It would undermine the integrity of the show to have a priest forsake his priestly role to dedicate so much time to playing a priest on a show like this.
None of the liturgical props in the show will be real. Chasubles, cassocks, chalices, patens: these and more will never be "borrowed" from actual liturgical use. They will be made or bought for the sole purpose of being a prop on this show. Props like these are one area that necessitates raising funds.