Lens are timeless but my setup is starting to show its age

DX format

D7000 - no wifi, no live HDMI
Nik 35mm f/1.8g
Sig 85mm f/1.4
Tam 17-50 f/2.8
Sig 18-35mm f/1.8
Nikon 24-70 f/2.8g

Looking at getting a wifi camera with live HDMI out. Not doing any studio stuff anymore. Mainly for candid shots of my newborn son and really need some sort of image stabilisation.

Any thoughts for an upgrade path that does not cost much. Would be even better if I can sell and purchase something else 2nd hand with not too much addition funds.