Inquisitive1

I developed an interest in academia late in my college years, but went the CPA route following graduation as I didn't attend a prestigious program and all of my professors were industry experts. Having been in industry for several years now, I'm exploring the idea again. I attended a small private regional university in Southeastern U.S., and dual majored in Accounting and Finance with a 3.96 GPA. I developed close relationships with my prof's in undergrad, but they are not researchers. They do have their PhD's if that is of any help. I interned with a large private company for over a year; spent two years in the SF bay area with a large regional firm in tax, and have spent the last two years in industry with publicly traded companies. I currently have a manager title in a blended role with tax and financial responsibilities. My interests are in tax and managerial. I also took a lot of Psych electives in undergrad, and think I would be interested in behavioral research. I haven't sat for the GMAT, but I did well on the CPA and expect I could study well for the GMAT. I don't have much of a math background and will need coursework regardless. My question is if it's worth the time and cost of pursing a master's for research exposure and LOR's or if I should go another route? I'm mostly interested in teaching, but think I might enjoy research as well. My brother is an Econ PhD. so I have some familiarity with it, but no real exposure. I'm married now and the primary breadwinner, so cost is certainly a factor. Any advice or perspective is greatly appreciated. Thanks!