The thing about House, is that at his core he's a control freak. He wants his little snowglobe, a shiny little toy encased in a glass dome for him to shake around and place on his shelf. That's what Vegas is to him. His little snowglobe, a bubble of pre-war glory filled with shiny lights and sounds. At it's core,anyway. He obviously has some other personal attachments and rational motivations, but in terms of his character that's what really matters. Mr. House could not give a Brahmin's tit about anything else.
That's not necessarily a bad thing,however. That obsession with Vegas means that he'll take damn good care of it. Under House, New Vegas willl prosper and become a shining beacon within the American wasteland. Moreso than it already is. Everything around Vegas don't matter to him, they can live freely as they like. As I said, that's not necessarily a bad thing and personally I think it's the best choice, but all that bull about spaceships is just fluff to encapsulate the Courier in the same feverish obsession and wonder at Vegas that he has.
In the end, House is a good choice, but he's not a saint. He's not an altruistic caring leader. He's a very focused man who knows what he wants, and he'll damn well find a way to get what he wants, no matter what.
If he's really a control freak, then he would already beat the Three Families into submission. But, that's not the case. Remember, a business relationship with Mr. House is basically that of an employer-employee type. Mr. House is a man who lived by contract; he would abide by every single word written in the contract, and he expect the others to do the same. If he's really a control freak, then Benny shouldn't have been able to do what he did.
If by control freak, you meant that he wanted everything to be under control; e.g he wanted everything to go according to the plan, then yes, he's a control freak, if not perfectionist. Still, when he planned you to do something about the Boomers (and the BoS through a cut-content), you can actually improvise, without having to absolutely follow his plan. And New Vegas? I can't understand all the arguments of him wanting to 'preserve Vegas like a snowglobe', when he personally said that he sees New Vegas as '
blast furnace in which can be forged the steel of a new rail line, running straight to a new horizon.'.
Also, regarding him not caring for the rest of Outer Vegas (and the Mojave), we have discussed it here few pages ago. I won't repeat myself, so please read the rest of the thread. Don't just go around parroting an opinion.
Yes, he's not a saint, nor an altruistic caring leader, hence why me and some others here argue that when you support Mr. House, the best ending you can get is when you're a Good Karma Courier, and done everything as specific as possible (like assign anyone else but the NCR to bring law to Primm, and prevent the Kings from reconciling with the NCR). Also, even though he's not altruistic, he did at least shown a degree of care, for his
employee; e.g people who agreed to work for him. Otherwise, he wouldn't even bother to reform the three tribes and let them drown in caps.