Solar can do all of those things. The most useful thing to do with ort cloud objects is to get them closer to a star for cheap energy. Once you get the ball rolling it's easy to beam power out to the ort cloud.
PS: Remember there is no night in space. So that's 4 * (149,597,870,700) ^2 * 1.3kw for billions of years. After the stars die, then we can start using all that saved up hydrogen.
Sure, but you have to concede that it is much more convenient having a small sun in your basement than having to deal with concentrating the energy from the giant ball in the sky. Especially if your halfway to Alpha Centauri. In which case the giant ball is little more than a bright star.
PS: Remember there is no night in space. So that's 4 * (149,597,870,700) ^2 * 1.3kw for billions of years. After the stars die, then we can start using all that saved up hydrogen.