Commissioners took their first look at the preliminary 2010 budget, which showed a possible real- estate tax increase of 20 percent, 3.58 to 4.3 mills. The hike would be $144 for a property assessed at $200,000. The $13.5 million proposed general fund, nearly 50 percent of which is composed of payroll and health care, contains unknowns such as health care rates and the results of the police and nonuniformed contracts.