The party is almost over.Manteca Unified schools as you know them today may cease to exist. Here’s why.There were 508 new homes started in Manteca in the 12-month period ending June 30. Based on market conditions in the Bay Area, subdivisions that have been approved, and key infrastructure that is in place such as wastewater treatment the chances are good the next few years will see close to 1,000 homes built annually in Manteca.Manteca has perhaps enough construction-related cash on hand to build one more elementary school that carries a price tag of $25 million.