Find a cheaper labor rate...

Seriously, that type of swap has a number of things to address in order to be correct. It is the little things that run the cost up.

I have an NV4500 (along with NP 231C 4:1 t-case) in my 94 YJ. The t-case was more problem than the NV4500.

A different clutch and input shaft MAY be required. (My transmission was previously installed in a YJ and I only needed a new throw-out bearing and clutch.)

You will need a CV-joint on the tail-shaft. I already did that a few years ago with a lift.

Both drive-shafts need to be re-done (shorter rear, longer front). Now is a good time to upgrade the yokes from straps to clamps.

Skid plate needs to be modified.

There are a few interior mods to account for different positioning of shift levers.