We can't afford Rondon he's like Zenit's best striker and easily a 30m euro player.
I think we need a good backup/second striker. I think can get Danny Ings, he won't be as good as Benteke certainly. Or maybe Michu or Lambert or Albuerto Bueno. Someone cheap of some caliber that could be good or could fail.
Moving on to our main striker if we're in Europe we can probably target a replacement striker thats quality but they'll probably be older. Someone like Nolito, maybe Mario Gomez, or Gignac. There are many options.