I'm looking into MBAs as a career pivot after working for a very long time in more technical roles, but my budget is quite limited. I've been looking at some budget options and Birmingham, Bradford and Durham seem all to be really good options. Are these the best schools in this category? Would the ROI be similar or are there considerable differences between these schools? Thanks for your input.

Aston has the triple crown and very affordable rates. Birmingham is also a great choice. Overall, consider the specifics of each of these programs, including the other ones you mentioned. A program that suits your goals best is more valuable than one that is slightly more highly regarded.