"Buying players is certainly a possibility but what has proved successful for us over the last few seasons is the strategy of loaning players with an option to buy them," he said.
"Players such as Ishmael Miller, Juan Carlos Menseguez and Youssouf Mulumbu fall in that category.
"This summer we want to bring people in who can further strengthen the team even though we have gone down a level."
Manager Tony Mowbray added: ""I would suggest working with 20 players is feasible. I've always said 20 players is fine as long as I like them all and they are my players.
"The emphasis can only be on quality. We have got some quality players. We haven't got 20 at the moment but we have to strive to reach that figure.
"If you get 20 really good footballers that you like, there should be no problem. I think the nucleus of this squad can play in the Premier League."
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