I don't know the answer for sure. But do you need them to move to Oasis Landing? I have had sims live there for a while occasionally. All of the careers and objects appear to me to be available in the home world. You just need to place the rabbit holes and buy the into the future objects for them. I don't think there is anything you miss out on if doing it this way.
On the other hand, I don't usually put sims into the at home type careers. They can earn plenty of simoleans working from home without joining the respective careers. So if they do lose their self-employment careers when they join the ITF careers, they will still be able to make their nectar and do their sculpting at home and sell the things they make.