Ive done this with rifle scopes, binos, and spotting scopes from Cabelas. At one time I had $30k in rifle scopes at my house and another time $20k in spotting scopes. I told them what i was doing and they had no issues so long as i didnt damage anything.Call Cabela's (or whoever) and order a bunch of scopes. Make sure of return policies.
Try them out on your terms. Return the ones you don't like.
I did that with binos. Worked for me.