It wouldn't even be hard. You've got the only source of electricity, so you can give people the goods and you have nukes, a robot army, no legion to worry about cause you killed em all and your capitalist NCR neighbor is now significantly weaker and you could probably get some stacks flowing by selling them electricity. Plus I'd get people to get their shit together more. Broadcast over radio New Vegas to all those somehow still functioning radios despite 200 years of rust and dirt that the hotels and motels throughout the Mojave are now free housing to those who need it or also want it, cause we're gonna start building buildings again. There is no damn reason no one has thought to make concrete yet. Weird shotgun shacks with charred skeletons still there for some reason will be a thing of the damn past, the resources are easily available to make pre war style homes with construction planned for further incorporation with other public works projects, a big one being to get clean running water to people. None of it should be radioactive anyway at this point cause there's this thing called the water cycle that you can learn about from the magic schoolbus. The issue is probably the pipes. Most of the problems these people face are really really easy to overcome. I'm dumb as hell and could fix most of the Fallout world's problems with an absolute dictatorship in less than a decade. These people spent 200 years not doing the things that make surviving past 40 viable, it's really basic stuff.