/u/MrGonghen - if I was starting out, I would get adapted lenses. Here's why:

Pros: access to thousands of Canon EF mount lenses - you won't have to buy new lenses if you buy or rent a Canon EF mount camera (e.g., Canon Cinema EOS, Blackmagic URSA, Panasonic LT, RED Raven), equivalent lenses cost less money (e.g., this $110 50mm f1.8) - autofocus is available with an autofocusing adapter - focal length reduction and an extra stop of light available from any Canon EF lens with a Metabones Speedbooster or Aputure DEC LensRegain.

Cons: Autofocus is slower with adapted lenses, Canon APS-C lenses are larger and heavier than equivalent micro 4/3 lenses

With a $600 budget, I would buy a $245 Kipon Autofocusing adapter and something like this $350 used Sigma 10-20mm f3.5 for Canon mount.

Here is an example shot with the G7 and adapted lenses, to include the Sigma 10-20mm f3.5:

• THAT'S HOW THE PROS DO SLACKLINING - 2016 by Rappasta

Hope this is helpful, good luck with your lens upgrade and best of the holidays to you and yours!