IMHO
The purpose of a premed is to get into a med school upon graduation. The general rule of thumb is to attend a school where you are the top 25% of the entering freshman, this will give you a head start with a potential good GPA which is the key for a med school applicant. Aside from the higher COA of BC, since you are getting off the wait list, you will not be the top 25% of the entering freshman of BC. As a result, you might not be able to get top grade in the class. Your outlook as a premed might not be very bright because of that. Of course, there are exceptions, but the odds of success is against you.
A kid I know, his mom is a famous physician in her field in So CA. He was admitted by UCB and UCLA for premed, but his mom advice against those schools, because he might not be gaining high GPA as competition is fierce in those schools. Rather, he went to UC Riverside and got a 3.95 GPA, now he is doing very well in Case Western.