You should only need to sign that many players each year, and, realistically, probably less. You are allowed 70 players total, so, to keep yourself balanced, you shouldn't really be targeting more than 17.5 players per year.
I try to nab 1-2 auto commits the first week, then concentrate solely on 10 players each week. They get 60 minutes each. Anyone that is an also-ran, that is, a backup in case I can't get someone, I leave on the board, but don't offer a scholly.
I usually end the year with 12-13 commits when the fresh crop of recruits come in at the end of the year. I add 10 more there and usually end up signing 18-20 a year. Some don't cut the mustard, others redshirt, and it all works out over time.
I've been changing recruits positions alot more this year as well. It seems to me that a lot of players play a different position better...at least more this year than in previous years. Look at that 3rd, 4th, or 5th WR and see if he'd be higher on the depth chart as a DB.