I am planning to apply for an online MBA program that is AACSB accredited and have low tuition rate. I have three options- UIUC/Boston University tuition ~24000, LSUS- tuition~12000. While both UIUC and Boston are well ranked university, LSUS is non-ranked but provides the cheapest option in the market. Also, I think getting admission to the LSUS MBA program will be relatively easier than the other two.
How much the MBA ranking matters in the industry?
Since, the LSUS MBA admission is easier and the tuition is cheaper, will it put lower value in my resume?
Can someone recommend which program should I choose?

Yes, the difference in average outcomes will be much larger than the tuition. There will also be a huge difference in the educational experience and the cohort you will study with. 

Focus on your goals, make them more specific. These are not the only programs. 

Thank you Duncan for the suggestion, can you please recommend some other good online MBA option with low tuition? 

See: https://find-mba.com/board/distance-learning/value-alternatives-to-unaccredited-mbas-58288