However, if we pay him a £31.2M signing on fee and £50k/pw then that's the same amount over 4 years...
Not sure we're in the market for spending £31.2M on one player but the sums are not outrageous in Premiership terms.
The main problem, as noted by others, would be that he's not going to come here and struggle when he could be going somewhere and winning trophies potentially.