There's a few things I don't understand with this post.
Firstly, you would rather see us sign a younger forward than Sanchez because that would make us better in the 'long-term', but where does that leave Sterling, Sane and Jesus all players bought for the long-term?
Secondly, who are all these younger players who ability wise are on par with Sanchez and represent better value?
Thirdly, Sanchez is a 28 year old coming into the peak of his ability, not a 33 year old looking for a swansong contract. Do you really think that players in the calibre of Sanchez, who's game doesn't wholly rely on pace, will be finished at the age of 30?
Finally, we haven't even mustered a title challenge in the past three seasons. Shouldn't the priority be assembling the best possible squad to win the PL rather than go overkill on the long-term vision?
Here's the way I see it. Sanchez is almost on par with Aguero, we sign him and we have two of the three best forwards in the PL. I'd be majorly surprised if any of our players, bar Kun, contribute to more goals than Sanchez next season.
Let's turn the likes of Sterling, Sane and Jesus into serial winners, that is what will take them to next level. I'd much rather they compete with someone like Kun and Sanchez who are currently better players than them than someone with a similar current ability to them.