Re: New to building. I am making my first motorized drift trike
Keep an eye on the front end geometry...it looks to me like your setup has the forks laid back pretty far. This is what those people are talking about. It might affect handling, especially since you are ALWAYS countersteering on a drift trike.
A 20" front end has better geometry as a trike. Yours CAN work (and WILL work as is), but needs to be much closer to the original bicycle geometry for best steering.
Talk to those trike dudes. They have all this stuff worked out already....
If more is better, then too much is just enough.
If you can't afford it, build it yourself.