Got my motorcycle endorsement in 1978. It's required in CT to legally ride on the street. The test wasn't that difficult (written test and practical test - ride around some cones, etc). The practical is a little more difficult now. Very similar to what you do on the range in the MSF BRC. You should take the MSF BRC first. In CT, the practical test you take in the MSF BRC waives the practical component of the motorcycle test required by the state. Unfortunately, the written test you take in the MSF BRC DOES NOT negate the need to take the state written motorcycle test. Most riders working towards a motorcycle endorsement in CT are more worried about the practical test than they are about the written test. Though, the practical test is not hard (it's just that the written test is much easier).
I don't know what Texas requires to obtain a motorcycle endorsement.
Though, I would consider borrowing a smaller, more easily maneuverable bike than a 'Busa. Why make life harder than it needs to be?
Good luck.