Paul Lambert has told the Birmingham Mail that decisions on further investment at Aston Villa rest with owner Randy Lerner.
The Scot is hoping to add during the January transfer window, with one deal for Carles Gil already tied up.
He made his Premier League bow over the weekend in a 2-0 defeat to Liverpool.
The Spaniard made a lively cameo at Villa Park, but an attacking spark is still missing during a frustrating season in front of goal.
Lambert is working hard to try and address that issue, but concedes that Lerner – who has been looking to sell the club – is the only man that can make the required funds available.
He said in the Birmingham Mail: “If you can do things and it’s not going to put the club in trouble and it’s good for the chairman, then it’s something we’ll try and do, bring one or two more in.
“The chairman is the one who will dictate what’s going to happen. He’s a really top guy who has put a lot of money into the club and we have to try and battle through it.”
Villa have gone seven Premier League games without a win – failing to score in their last five fixtures.
Just three points now separate them from the relegation zone and they are starting to look over their shoulder.
Investment is required if they are to turn the corner, but rebuilding the confidence of those already on his books is just as important for Lambert.