Relying on Richarlison to replace Kane would be a huge risk imo.
He's never scored more than 13 league goals in a season and hasn't looked particularly convincing for us, particularly technically.
I'm fine with him being a good squad option capable of playing up top or wider but if he becomes our main PL striker I'm very worried. Appreciate some will point to him being Brazil's number 1 but I've not see him show that kind of form in the PL. I also don't see him as a long term starter in Son's position. He lacks the pace and dribbling/link up ability to play in that position for me.
If Kane goes for say £80-100m, we need to spend that money on a quality forward and then we need to spend money on a quality player to be a long term successor to Son too.
Definitely want another option (starter level!) to add to Richarlison if Kane goes but a bit harsh to hold Richarlison 13 league goals against him considering who he's played for in watford and everton, where those calibre of teams are lucky to get someone hitting 10 goals most seasons.