You really don’t need a lot of $$$ to join the E-mount system. Photogearnews writes:
We challenged Warren to see just what he could do with a budget video kit that cost us just over $500. What we found may have been the best budget kit for video. The entire kit was based around a used Sony A6000, which if you have some patience you can find, as we did for around $250 (and £250). Then we threw in some brand new budget lenses. There is even more of a bargain to be had if you can find these lenses secondhand. Find out how Warren got as he talks of his experiences and gives advice on how you can build a similar setup of your own.