Straight loan with no buy option would be fine but doubt ManU will agree to it.
buy option or not literally makes no difference. If it's an option, you just don't exercise it, if you don't want. No point in even discussing about it, much less blowing the deal over it. They can put a 100M option to buy if they want, we just won't buy him, simple.
The main problem about Rashford on loan is that it doesn't address the depth option long term.
It is the same like when we got Felix and Cancelo. Sure, for free and low wage they were solid options, then what? This year we didn't have anyone, then this summer we will ho for loan option again, them next summer we will face the same issue.
He is here to ease the burden off Lewa and bridge the gap until next summer, when we can hopefully go all out for a top striker WITH Lewa also leaving, making the space on the wage bill as well.
Doing this deal this summer allows us to really shore up our GK and defense this summer, fix what needs to be fixed, to really gain options as great as we have in midfield, also in defense and in goal. And if a loan here can help us save money for a good LB backup and Garcia (and possibly a new CB), then I'm all for it. As for the profile, Rashford is literally perfect, since he can play both LW and ST, thus cover for both Raphinha and/or Lewa. Rashford and Ferran (who can also play RW) as backups, not bad.
Then next summer we hopefully have our GK, defense and midfield sorted, so we can focus all of our attention (and money) to buying the next great Barca striker.
And possibly even a good LW, if we'll have more money to play with after having the Camp Nou revenues for a year.