The one way I can envision Boyd being affordable (not just in salary cap terms but in terms of value for money) is that if he comes here at a discounted rate, say 300-350k a year to be with Bennett.
It's pretty well known he has some issues he is working with and being around a support set-up (i.e. WB) would probably be a good thing for him. If he's willing to join us at a discount for those benefits and in acknowledgement of the fact his form doesn't deserve a big pay day, and he's willing to play at wing or centre then I can happily support that. In fact, I actually think that would be a great deal for us. It'd only be 100k more than Reed and he's still a very good player (it's just that he doesn't add much to our team at fullback or 5/8).
The real (potential) problems are that WB likely favours him so much he'd just give him a spinal position. The other is that it could come at the expense of Barba having, at the very least, a starting spot in our side. Again, Boyd is a very good player, and he does have the potential to add to the side, but if you have to ship Barba for him then his net effect is not positive IMO. I'm on the fence if it is at the expense of Hoffman.
