Rangers became the first team in Premier League history to fail to win any of their first 16 games in a season when they were held to a 2-2 draw by Wigan at the DW Stadium.
The Rs boss said: "If we don't win a game or two then I wouldn't ask them to spend any more money. I think it would be unfair to the owners."
He added: "I wouldn't tell them to go and spend big money on a couple more players if we're that far adrift. You've got to be realistic.
"I'm just hoping we can get that win or two and then I'm sure they'll have a go, because they've had a go in the summer. They've done whatever was asked of them and look what they've ended up with.
"It's difficult. I can only work with what I've been given. It's like you've dealt me a hand of cards and this is what I've got. We've left ourselves with a squad that's got no balance to it, we've got no strikers."
It was the Latics' first point in three games but manager Roberto Martinez felt they deserved more.
He said: "We are disappointed because to concede two goals is always frustrating. I just feel that for us to score a goal we need to be perfect.
"And the first time that QPR get in our box they get a free header and then in the second half they didn't have an attacking threat but they got in front. But I was very pleased with the manner in which we reacted to going 2-1 down.
"It would have been all too easy to panic, to lose our composure but I thought we were very mature and we're disappointed that we couldn't get any more because the chances were there. I thought Robert Green had an outstanding performance and in many ways I thought we deserved the three points."