Of course the Kain's new 'assistants' couldn't possibly stay in his usual laboratory.
For one, he had too many secrets there, including the notes and research results based off of those stolen from that evil organization created in their efforts to help Gabriel.
However, after Kain had notified the university about his latest research achievement, the FMT pill, it immediately took the top brass by storm and they readily agreed to any of his requests—including an additional research space.
Of course they were also much more willing to grant him an additional lab once he clarified that it didn't need to be equipped with any expensive equipment, he just needed it to essentially convert it into a shared office space for his research assistants.
After some simple furnishing, the office space Kain prepared seemed luxurious at first glance—especially since it would just be used by unpaid assistants.