Answer:
When I'm thirty years old, I'll be living in New York. I'll be working for a large company. I'll be earning a lot of money. I'll be spending a lot of time doing hobbies. I'll be driving an expensive car. I'll be living with friends. I'll be traveling a lot for work and pleasure. I'll be seeing the same people I see now.
2. In fifty years time, a new medical school will have been built.
3. Within the next 100 years, a new medical school will have been built.
4. It is unlikely that a new medical school will be built within the next few thousand years.