It's like being the #4 center in HS football recruiting, that might make you a 3 star recruit.
Marco is ranked #180. There aren't very many guys rated as combo guards. Part of the problem is that he doesn't project as a combo guard at the college level, at least not for a few years. He projects as a 3 that can slip over and play a little 4 in small ball line ups. He needs to tighten up his handle and improve his quickness to play the 2 or 1.
If he can adjust his offensive game to play against High Major athletes, I think he can be a good player. He's strong and has good hops, has a nice mid-range shot, and is a fine free throw shooter. He's going to have to adjust from playing in a weak HS conference where very few opponents had a player his size and athletic ability.