I am very much into home made bikes especially from Brad's excellent plans. And powering them with e assist as well. I currently am running a Bafang BBSHD on my fatbike, and a BBS02 on a homemade 2 wheel recumbent. Both mid drive motors. And now this spring for the first time a small 500 watt geared front hub motor on the delta trike. I have no idea how it will actually work and feel. Honestly I can't give you an opinion on what you plan, my suggestion is lot's of research keeping in mind their is lots of info out, some of it is misleading or someone's opinion.
I don't know where you live but take a look at Golden Motor.ca. They sell both front hub and the differential units. I do have a 1000 watt rear direct drive hub motor from them, called the Magic Pie, it certainly did not inspire me with it's reliability but it was pretty fun when it did work. Maybe it would be wise to find out what the tuk tuk type units use and go from there.