Cancelling score, then reinstating years later (please advise)

Here's the situation: I have been accepted to an Analytics program. Normally the program requires a GMAT score, but I successfully applied for a GMAT waiver because I have an Engineering background with a good GPA (although not outstanding). After being accepted to the Analytics program, I decided to start studying for the GMAT because it is my dream to got to a top MBA program at some point after completing the Analytics program. As you know, in order to get into a top MBA program you need a score well over 700. I have been studying for about 6 weeks and unfortunately I may not make the mark this time around. Yes I could perhaps study for another 6 or 7 weeks and perhaps make the mark, but I have decided that I have more pressing issues to deal with at present rather than concerning myself with an MBA program which I may or may not do a minimum of 4 years from now.

Unfortunately my Quant score is embarrassing. Based on CAT performance I feel that I will be able to hit Q45 and V36 which I think will give me a 650. I plan to give the GMAT everything I've got for the next 3 weeks and then write the test. (I have not written the GMAT yet). Hopefully I can bump the score up a bit.

In the event that my Quant score does not improve (or gets worse), I feel that I should cancel the score. If i do not cancel the score, MBA adcoms will assume that I used that GMAT score to get into the Analytics program and perhaps make it look like a bit of a joke. (Even if I get a 700+ score written after the Analytics program)

On the other hand, I don't know where I will be in 4 years, hopefully I can still achieve my dream of going to a top MBA program, but it may be that I am constrained to going to a local MBA program due to various factors. The good news is that if I am constrained to going to a local MBA program, I can at least reinstate the 650 and use it to get into a local MBA program.

Yes I know, that it may be seen as a bit of a cop out to come all this way and then cut it short when you don't meet your score goal. But I've got to prioritize things in terms of current importance. Yes, it is advisable not to get distracted with such scenarios, but it is also important to be strategic so that I don't regret anything later.

Is there any reason for me not to cancel a score in this situation? I wouldn't do it at the testing center, that way I would at least get the print out for future reference. What is lost by cancelling a score, other than the reinstatement fee?

Please advise. Thanks.