So I decided to get over my fear of actually having a challenge in game on the skirmishes (normally start with 50k).
I selected 10k starting cash me as Stealth and oponent as random (turned out to be USA Air Force).
After allowing me to build my base and start building a Scud I became suspicious up to now my opponent had attacked one of my Derricks with two rangers. I flanked round with a few hijackers and found he'd acted like an easy general, he'd built all the basic buildings apart from supply centre. I assume he'd built everything barring the supply then made ranger and ran out of money...
I haven't got time to retest this at the moment (nor any images/videos, which is stupid of me).
I'll try to do it again and get images...
EDIT: Just tried it again hard setting it to USA AF. This time he was playing properly.