The requirements for an economics major may have changed since I was there, but when I went to Beloit the economics major was very math-focused and rigorous. It required calc I, calc II, differential equations, and statistics. The whole goal of the econ major at Beloit was to prepare students for graduate school. Frankly, that emphasis on math (and the fact that I got a D in my calc I class) is what convinced me to major in political science and history rather than economics. But the econ majors I recall who had the math chops to stick it out were admitted to top-flight graduate schools and had some very good internship (one in particular I remember was internship opportunities with the Federal Reserve) opportunities. If you have not already done so, I would visit Beloit, sit in on an upper level economics class, and talk to an economics professor. Find out for yourself what the level of expectation and rigor associated being an economics major at Beloit.
My situation was similar to your situation. I chose Beloit over other liberal arts colleges and my state flagship university (Indiana University) largely because with the financial and merit aid, it had the lowest out-of-pocket cost of any school. I have never regretted making that decision. Good luck.