The 50-year-old has acquired Stephen Dobbie, Dwight Gayle, Jerome Thomas, Jose Campana, Kevin Phillips and Elliot Grandin so far, but admits it has been hard to add to that list
The 50-year-old has signed a total of six players, including play-off hero Kevin Phillips, as he looks to avoid an immediate return to the Championship, but is determined to add more before the first day of the season.
He told reporters: "The market is absolutely crazy. You have a certain time to go shopping and you have to go shopping at the same time and everyone sees how much money you have.
"I have had to turn my phone off because it's on meltdown. It's an absolute nightmare but once you sift through it, using my 18 years of experience as a manager, we will get some good signings in. I might need five, six or even seven."
He is yet to replace Manchester United winger Wilfried Zaha and the injured Glenn Murray, so a goalscorer is high priority, and a move for Arsenal striker Marouane Chamakh is on the agenda.
When pushed for a definitive answer on the Morocco international, Holloway replied: "You will have to speak to my chairman about that one. If it happens then it happens, if it doesn't then it doesn't.
"We still need to make a few more additions. With Wilfried going and Glenn [injured], I've lost a lot of goals. We have set ourselves targets and we need to be able to give ourselves the best chance to compete in the Premier League."