The 29-year-old has rejoined Russian outfit Anzhi Makhachkala, with Rangers recouping almost all the £12.5million fee they spent on him in January.
With such a considerable boost to Harry Redknapp's transfer coffers, and with the parachute payments from the Premier League, Samba hopes his old club can spend wisely and return to the top flight at the first attempt.
"Rangers already have a great squad," said Samba. "But it's true that with the money they've got, I hope they do some smart recruitment to get the players they need to face the battle for promotion."
Samba has paid tribute to QPR chairman Tony Fernandes, who was keen to retain the giant defender's services at Loftus Road.
"Tony Fernandes is a great man," Samba added to the Sunday Mirror. "He wanted to keep me and help him back up, but I believe the offer from Russia was too good to let it pass by.
"It was a big decision and not one that was easy to make. I wanted to help the club to get straight back into the Premier League, where they should be.
"I was not planning to go anywhere. I wanted to reward the club for their support. I was getting mentally prepared for the battle in the Championship."
Samba was plagued by knee problems during his six-month spell in west London, meaning he only made 10 starts in the Premier League, the last being a 2-0 home defeat by Stoke City on April 20th.
"I wasn't 100 per cent fit," said the former Blackburn Rovers man, "So, I couldn't give my best to the club and the fans who deserved better. They are great fans and then stood by the team despite the results."