Guide me to buying my first dslr or mirrorless camera?

Hi guys I'm going to buy my first dslr or mirrorless camera and I'm going to be very specific on what I'm looking for so you guys can help me decide on which one to get.

What I'm going to use it for:
Landscape/City
Not really going to do videos.

Features I'm looking for
Built-in Wi-Fi (mandatory) (or eyefi compatible)
Weatherproof(kinda optional)
Image Stabilization (optional)
Compact(I can handle weight, just don't want it to be bulky)

Cameras I've been searching up
Mirrorless:
Olympus e-m5 or e-m5 mark ii
Olympus e-m10 or e-m10 mark ii
Sony a6000

DSLR:
Pentax K50
Pentax KS2
Pentax K3-II
Canon t5i or t6i
Nikon D5300 or D5500(but this is kinda too bulky for me)

Feel free to add more that would be suited for me.

Now I know lens is just as important as the body. The kind of lens that captured my interest are the wide angle lens. Any suggestions for those are much appreciated. I think I saw a cheap one(Rokinon 12mm f2.0)

Price range:
I don't mind using second-hand so I don't think price is an issue.

Any opinion/comment is appreciated.

Body and 18-55mm will get you started, and is excellent for what you want.

I'd go for the Pentax K-50 with its weatherproofing and body-mounted anti-shake, but it's down to how they feel in your hands.

Wireless/Eye-Fi allows you to download your photos to a computer (within range), rather than plugging your SD card into your computer, it's not really that great.

Rokinon (and whoever's bought this week's batch of labels) do a range of lenses without electronics (manual focus, and limited exposure modes), but the effect gets very old very quickly - look at extra lenses after you've built up experience with the 18-55mm.

You can also look into the Fuji X-T1 It's weather proof so you can use it in the rain. Their mirrorless system has a 14mm f2.8 lens

Canon EOS M (or whichever is currently available at the best price) with the EF-M 22 mm prime. Not weatherproof, no anti-shake (what for?), no Wi-Fi, but a very nice lens with a very good image quality.