i don't think what you fill out on the questionare will be the end all of his draft status. if it gets far enough they may come to the house and talk with the family. that's a time to get an idea about money.
scouts will recomend a round or how much they really like the player. and if the scout has players in mlb he tends to have a little more pull. if cross checkers back up what the scout say's even better. we had calls up until noon on draft day asking about money and my son wasn't in the top ten rounds, even then it wasn't clear until a few days later.
things aren't the same for everyone. each team has different aproaches, if your son is giving up 4 years at a major d1 then he may be worth a bundle. vs two years at a jc. or he may just be an out and out stud ,and thats will mean a different aproach.
there are around 1400 kids drafted every year with about 1400 different aproaches. as we told the few that came to the house about signability, if you want him draft him. but again that's one of 1400 tactics. enjoy the process it can be fun.
it's your story tell it the way you want.