The more I think about it, the more I'd prefer to portal at QB when we need it and then take 2nd tier kids annually like Van Dyke, Emory Williams, Jake Garcia, Jacurri Brown, etc to build depth and experience.
Think about it. With King it worked out perfectly. Assumed 1 year rental (or 2) allows you to still recruit high ranking prospects, but not the 5* kids necessarily.
It's hard to stack 5* after 5* on the bench but you can get one every few years while guaranteeing experience through the portal and building depth with 2nd tier recruits. One 5* kid can ruin your depth, especially if they don't pan out. I'd rather keep 3+ 4* kids on the roster and play the odds than risk depleting my roster by going all in for a 5* kid.