Oskar,
A lathe is a requirement of life. One would open up so many more options for you. A mini-mill would be helpful also. I have not been impressed with the combination machines I have seen. I especially don't like the ones with the mill at the headstock. One with the mill midway of the bed might be OK, but I have no experience with them. Keep your eyes open for a used machine, sometimes you can get a good deal. If you find one get all the tooling with it that you can.
Mike