Just a polite heads-up in case you weren't aware: for non-game usage of Unity, the licensing situation is... a little complicated. That goes for the engine as well as a lot of the stuff I've seen in the Asset Store. Just a thing to bear in mind, and potentially a reason to use a different engine.

It's not that complicated.

The pro license at ~$2k/year per seat is all you need unless you are making a shitload of money. In which case, you are going to pay ~5k/year per seat.