Big boys' games spell pain for Watford and Warnock.
The Hornets have spent just pounds 1.5m this summer - all on Wigan reject Damien Francis - while also landing veteran Chris Powell on a free transfer.
Chief executive Mark Ashton said: "We're fishing in a different pond to the one in the Championship and we're after a different type of player. But Aidy Boothrooyd, the manager, has said from day one he is not looking for big names or superstars - he's looking to bring in hungry players."
Neil Warnock accepts Sheffield United must learn the harsh facts of life in the Premiership. The Blades boss said: "We know we're going to get punished at times, unlike in the Championship, but that's the quality we're up against.
"Everybody knows there are two divisions within the Premiership - you are pitting yourself against the best there is.
"Mainly you're probably not as good as the side you're facing.
"That's why people are saying it will be a great achievement to survive. Psychology will come into it because when we lose three or four on the trot - which is bound to happen - we'll need to get ourselves firing again."
NEW WAVE: Neil Warnock's Blades are banking on survival' GET A GRIP: Bothroyd will be careful in transfer market