The one thing against Arnautovic would be he signed a contract extension last year didn't he? If so, we could forget about signing him for under £30m in this market, and that would be then be a firm no from me in those circumstances. There simply must be better value elsewhere.
We aren't, from what I see, going to sign 6 x £30m players, or 8 x £20m. Nor will we go on a huge hot streak and sign our top target in every position. There will have to be compromise, much as Koeman would never admit it in public. That is essentially the nature of the market for a club like ours.
To secure quality and quantity is the objective, but the two are not always bound together., at least not to the same degree. Particularly if we are looking at a player like Cuco Martina for example. There will be cheaper signings, who will probably have a bit of a "meh" factor about them, but they are going to be equally as important, if not more so, than the flashier ones.
RK having options off the bench will be as important as a strong XI.