For screening purposes, there are a few brief intelligence measures that are valid for four-year-olds, such as the RIAS, WRIT, and KBIT2. It would certainly be cheaper than the WPPSI-IV or SBV, but not by enough to make it feasible as universal screening. The instruments themselves are about a quarter the price of one of the comprehensives, while the cost in examiner time would be about 1/3 to 1/2.
Currently, public schools are mandated to do universal screening with K students to identify disabilities. One of the best instruments for that is the DIAL4, which does generate standard scores/percentiles in the Big 5 developmental areas from age 2-6 to age 5-11. Granted, it is designed mainly to pick up the low end of the distribution, but it wouldn't be unreasonable to use the concepts and language modules as pre-screeners for the high end, just as they currently are used as pre-screeners for the low end. Every district owns a system similar to this (although not all are equal in quality), and invests 30-45 minutes per entering kindergartner in administering it. The data are already there. Someone just needs to catalog and act on them.
