McCartney said the Tigers' offer of a future first-round pick and pick 31 in the 2022 NAB AFL Draft would need beefing up.
"That's all they've got left obviously," McCartney said.
"Everyone would understand that once that future first goes out, unless something else is coming in, the futures can't be touched so that's what remains.
"Most would know that feels a little short for a player of that quality. Richmond understand that.
"It's really assessing, once again, a number of other deals that are going on and what potential opportunities are being involved there, to strengthen that. We do need to give consideration to (incoming) players as well."
McCartney confirmed GWS is interested in Tigers ruckman Soldo who could be a potential deal clincher to send Hopper south.
https://www.afl.com.au/news/854381/giants-look-at-big-tiger-in-potential-deal-for-wantaway-mid