Hoping to boost enrollment, the board of the Nicasio School is considering starting up a state-funded preschool, though not this fall. Last month, California pledged funding of roughly $50,000 for the program’s ongoing teacher costs and start-up expenses; the county has agreed to cover another $10,000 and the West Marin Fund is prepared to provide $15,000. But last week, the school board voted to table the idea until next year, allowing time for further discussion.