Complex sentence: Rev. Joseph A. Byron, the new pastor with neither church nor rectory started from scratch with door-to-door census of his prospecive parishioners who he found very willing to back him up with plans for a church of their own.
Split into simpler sentences: Rev. Joseph A. Byron, the new pastor, had neither church nor rectory. So he started from scratch with a door-to-door census of his prospective parishioners who eagerly supported his plans for a church of their own.