According to their own website (
http://www.med.umkc.edu/education/default.html, Extension and Readmission
Twenty-eight percent of UMKC medical students take more than six years to complete the program.
This extended time provides the opportunity for students to pursue personal interests such as research or fellowships, or to successfully complete curricular blocks. Approximately two-thirds of these students graduate from the UMKC School of Medicine.
Those aren't good odds esp. since most medical schools don't have such a bad attrition rate, not to mention if you're out of state $54,083 is a lot of money, and that's JUST tuition. Do the normal route or AT LEAST, do a accelerated program at a more prestigious institution.