Large-scale electric-vehicle (EV) uptake is challenging the power grid due to a lack of sufficient hosting capacity. Most smart-charging studies still treat EVs as stationary loads in one location and ignore their mobility. This work closes that gap by evaluating an EV-based virtual electricity network (EVEN) that lets vehicles charge at one feeder and discharge at another. We formulate a comprehensive framework that combines inter-network energy-delivery optimization, stochastic time-series hosting capacity analysis, and battery-degradation assessment. The approach is tested on two real-world distribution systems: a voltage-constrained 50-bus rural residential network and a capacity-rich 76-bus industrial network. Simulation results reveal that shifting only 10% of the evening demand from the rural to industrial network cuts the rural undervoltage index by roughly 80% and weekly violation counts by 65%, while adding no more than two minor violations upstream. At this level, average yearly battery-cycling degradation rises modestly from 0.4% to 0.8%. The study thus demonstrates EVEN as a cost-effective, scalable alternative to physical reinforcement and provides the first integrated assessment linking network-level benefits with battery-health impacts.