PROVINCETOWN — The Community Builders have been preparing to build 65 apartments on Jerome Smith Road since they won the bid to do the work in late 2021. But their cost projection  rose from $22.3 million then to $37.8 million a year later and now to $39.4 million. On Dec. 7, the Boston-based nonprofit developer turned to Wellfleet for help, asking the town’s community preservation committee to kick in $500,000 to support Provincetown’s project.