Would it look better to admissions committees if I took Stats, Accounting, and Microeconomics:
1)...at an in-person classroom-setting but at a local community college or 4th tier undergraduate university?
2)...online at a more respected undergraduate university like UC - Berkeley, UCLA, or UTexas - Austin?
Cost differences aren't much. As far as my academic background already I haven't taken the GMAT yet and I have a 3.5 GPA from a top ten undergraduate university. However, my major and minor were in liberal arts subjects. I do have some quant courses from undergrad already, but the grades aren't too high (Physics courses: A, B, B-; Calculus courses: C-, C).
Probably you can mention both of them and show your aggressiveness and the motivation to adcom. Either of them has pros and cons while together they are complemantory to each other. It'll also show that although you're physically in a lower tier classes but you're eager to thrive in the fields that you voluntarily took extra courses in highly competitive schools.
I believe adcom will be more interested in the reasoning behind and your personal career objectives. At least in those sample essays.