In a certain sense you're right, but I've wandered from the main depot and the desert Mojave area at least 4-5 times, before getting that CB call, made some money, and made some visual customizations.
You've made a great work with those walktroughs, but this problem together with the AI glitches (that means that I could have other issues in the future) and the daylight scenes being so bright, don't leave my with any other decision
Maybe we'll see in the future, whenever a Nevada expansion pack (aka huge upgrade to the main game) will pop out.
See ya, for the moment.