Hmm, it depends how much you're going to be using the 3D features that Unity provides. If you're going down the big list of Unity 3D features and you're thinking you need a whole bunch of them, then it's possible that Unity would be a time save in the long run. But honestly I like Godot so much that it would take a lot to tip the scales.

I would personally not use Unity at all because I find the developer experience so frustrating. I'd rather spend an extra couple of days enjoyably hacking something together rather than spending less time in more frustrating ways (like waiting for compiles). But I feel I'm more sensitive to these things than most people.