MBA or MS in Taxation? need advice!

I'm old (early 30s)..compared to you guys here. G740, GPA3.9 from avg college in NY. Right now in the early career of taxation in a public accounting firm..in the process of CPA exam. but I don't like accounting, choose it just for the sake of making a living.

wondering a way out.

MBA in finance: high cost, old age, no a tractable W/E, targeted top 10 B-school. got dinged by Columbia for Early Decision.

M.S. in Taxation: low cost, realistic, easy life, no need to be in top school, avg school is fine.

Or, after MST, 2-3 yrs down the road, after CPA licensed, a manager then possibly, then apply for top MBA. in this case, I will in mid-30s, is that too too old for MBA?

Any advise and opinion, please! I appreciate!