The problem with more units is that the initial cost for production isn't a joke after awhile nor is the upkeep, so you need to expand and then focus on building to maintain or to increase production where as if you halt expansion you can afford upgrades. I think there is a nice balance there where the game isn't going to punish you horrendously for not REXing / ICSing in a given time frame.
Each unit is going to cost you anywhere from 40 energy to 300 without price reductions and upkeep of 4+. Plus energy for tactical operations and demands. Factor in any strategic operations per turn and you start having a decent case for not churning out units and focus on quality.
Each unit is going to cost you anywhere from 40 energy to 300 without price reductions and upkeep of 4+. Plus energy for tactical operations and demands. Factor in any strategic operations per turn and you start having a decent case for not churning out units and focus on quality.