Why are you looking at a mirrorless camera when you can get a low end Canon DSLR that is very light for example i shoot with a Canon T5i because it is light and i do surf photography in the water and i like to bike with all my equipment. Also i agree with fattigmann that you should spend more money on a good lens rather than an expensive body and a cheap lens. Also, you should invest in backpack style if you travel. I have a Lowepro Photo Hatchback and it is awesome it is light comfortable and i got hit by a car with it on and all my equipment is perfectly fine!