Not to sound mean, but you're 26 and you're living at home. If you don't like it, leave. Don't have enough money? Get a 2nd job (If you're 26 and you don't have at least a full time job and you're not disabled, there's something wrong, work IS out there)
Again not trying to sound mean, but on average most people just want to complain about their problems to anyone willing to listen, but won't actually do anything to help themselves get out of the situation.
Anyway, back on topic: On the weekdays I go to bed at 10pm, get up at 6am for 10hr shifts every week. On the weekends I generally stay up till 2-3am doing nothing but goofing around on the internet.
Also, to help with your 1am-7am internet problem here are a few possible work arounds:
-Try changing the clock on the computer to trick the program preventing the internet from being used. This isn't fool proof, but it can fool alot of time restricted programs into running provided they themselves aren't using internet time.
-If he has wireless internet, may I suggest a cheap laptop/netbook? Or for more secrecy, an iPod touch or Ipad (Easier to hide)
Anyway, good luck.