In this collab with Bronx High School of Science student Marco Giordano, we designed a service region and fleet allocation optimization model subject to elastic demand, applied to e-scooters. The tool can be combined with demand forecast models to identify spatial mobility service needs. A case study of Manhattan building on the earlier forecast model from Mina Lee shows there exist budget thresholds where a strategy should switch from zone expansion to fleet expansion. Should be of interest to micromobility companies and cities.