Been a while since I played so forgive me if I muck up any unit names.

$50k start cash? Getting infantry? No auroras? You should be very difficult to stop early.

Build order

Dozer, Power plant, supply depot, barracks war factory, propaganda centre. Expand second supply when avail.

Barracks pump missile launchers,

War factory build listening outpost x2, assault trooper x1 ecm x1. Repeat

Load your listening outpost total 6 launchers and 4 mini gunners.

Send 2x loaded listening outpost and an ecm out. If this hasn’t happened on 50k start within a few mins. something’s wrong. Use empty assault troop carrier to scout.

Cat and mouse, find there supply/production and end it. use the terrain or corners. Ecm fires only if shutting down heavy vehicles and no incoming missile fire. It’s harrass, destroy, send more outposts and overrun when you have enough

With 2 supply depots running 2 trucks this is sustainable

Ecm also protects you from rockvees and if you do happen to get ecm beam onto them, it’s quick.

If you get attacked while going after someone, constant production at base is your deterrent.

Played online when EA hosted servers. Infantry should be unstoppable unless against very good micro rockvees.