In Allen this year in a battle for the #5 SF, I was 230 miles, Arkansas 50. I spent $60,256, Arkansas a tad over $42,000.
We both promised a start + 20 minutes. I used 32 campus visits, 61 home visits, 4 scouting trips, 11 calls and 16 letters.
If I convert my spending to Arkansas distance costs, it came out to $45,715. Arkansas (trink115) told me he spent almost exactly $43,000 on Flood, and promised the same start and 20 minutes. Flood signed with me the last day of recruiting in the morning, the sign of a very close battle. Both of us put 90% of the money in the first 24 hours.
I had a B prestige and Arkansas had a B-. So either I allocated my money really poorly, enough to wipe out my B vs. B- advantage plus around $2700, or the favorite school being Arkansas was worth something.
My general feel is that it was worth around 10% bonus to Arkansas. That would have given them $47500 of effort vs. my $45715, and then my slightly better prestige won it for me.