Not sure why you would wait to after signings. If the player is at a distance where it won't break your budget to send 10 scouting trips, then go for him, assuming he's not considering anybody. A lot of times it's important to be the first one on pulldowns because other people will be weary to waste money just to start a battle. If he's too far or not good enough to pull down, wait until he drops. If you got a backup message, you'll get another message once he drops if you don't do anything else, and as long as nobody else signs him. t may take some time for him to drop though.
I hope I helped, if you have more specific questions, or if you want to know what you should do in your specific situation with the amount of money you have available then I'd recommend sitemailing a mentor, or me if you want. It will get you a more specific answer.