As others have said baseball scholarship money is very hard to get. It is around 1 in 10 players who play HS baseball will play in college at any level. People who don't have HS baseball players seem to underestimate the amount of talent you have to have to play any level of college baseball.
A cheap way to do this is see if you can get him on the mound and pitch to some Varsity HS players from your area. Watch how the batters react to how he pitches to them. If he can blow his fastball by him anytime he wants or keep them completely off balance with his offspeed pitches then he may have a shot. You should then get him a good pitching coach and work intensively at this point on strength and conditioning. Then you can worry about getting him seen, there have been a lot of good suggestions.
If they can square him up routinely or are not fooled by his offspeed then he has a ton of work to do.