bro , can you give some advise

i looking for 1 set cctv
what the diff or coax and ip camera?
as i feel ip camera more easy ,coz i only nid get the camera power but no nid cable as can using wifi or lan right ?

and whats the price for 1 set nvr with 4 camera
or 1 set dvr with 4 coax camera
looking for a economic one as i just put inside house living area
but nid got night vision as well