Amain has this 14th scale brushless for under 170 right now.
https://www.amainhobbies.com/team-associated-reflex-14r-hoonitruck-1-14-4wd-rtr-electric-truck-asc20177/p1477274?utm_cid=5760083
And the one you were looking at is under 90 now and apparently not on sale......uh. I hope you didnt buy...
You are overthinking this.
For a trainer car on a less than ideal surface, I got this one for my first. It had both rubber tires and hard plastic which is what he will need for those bad surfaces. If he decides he does not want to get into it all you spent was 74$
Then if he likes it get a...