I am using Using QGIS 18.16 to try and create a grid measured in feet. I am having some issues with the best way to create a accurate grid in a project projected in WGS 84. I know that it uses degrees but i need to come up with a way to create it in feet. I have tried the Vector Grid creation and a few plugins but i feel like i am missing something and making this a little to hard.
WGS84 coordinates are coordinates on a spheroid. You can't have a regular grid on a spheroid.
Over a small area you can use another coordinate system that is planar and make a regular grid with that, but it won't be a regular grid if you transform it to WGS84 (lat-long) coordinates.