I agree Bean will not panic or overpay here. However, one reasonable scenario I could see playing out is the following.
1. This week they activate Elam. Elevate a corner form the PS to game inactive. Sign a vet to the PS.
2. This week Von Miller starts practicing, but does not get activated or play. The Bills have 21 days from when he starts practicing before they have to activate him.
3. If we do not suffer any injuries to the defensive line the next three weeks, then we will have to waive or release a solid lineman to make room for MIller.
At that point you will have had three weeks to get a feel for your active corner play and depth. If you need another corner, there could be a solid player for player trade. Depth dline for depth corner.