It is not a easy decision. ! Y8 g0 F) Y* u0 V' p: o K+ d% W8 P& P3 ]7 e
If I were you, I do not reject this offer for now, ask the possibility to do a part time supervisor.
first, congrats on the supervisor offer. second, you need to make your timeline more clear: are you planning to do BBA right after diploma (so in april)? or will you be doing BBA in september?