FARMINGTON — Leaders from Western Maine Homeless Outreach are optimistic about the possibility of moving into a new space downtown that would nearly double the capacity of Franklin County’s only homeless shelter. The shelter, currently located on U.S. Route 2 in the basement of the Living Waters Assembly of God church, is eyeing a new space in the Holman House, a historic home that is part of the Old South First Congregational Church of Farmington on Main Street. “We often have a waiting list, and if we were able to change locations, we could have a larger space where we would be able to serve more people and more families,” said Diane Alexander, case manager at the shelter.