Football finance expert Chris Brady says Reading supporters should be "cautiously optimistic" about the takeover of the Championship club.
On Saturday, chairman Sir John Madejski said he had agreed to sell 51% of Reading FC to Thames Sports Investment, led by Russian Anton Zingarevich.
The news of a takeover has been met with mixed feelings by Reading fans.
"Reading fans should be cautiously optimistic. I can't see billions being spent," Brady told BBC Radio Berkshire.
TSI are said to be a newly founded private investment company and the transaction is scheduled to be completed in March.
The agreement, reported to be worth £40m, is now subject to due diligence and the normal procedures from the Football League.
"The father of Anton - Boris - is the real money guy," revealed Brady.
"Anton is only 29 and is using his father's money. I know Boris has been sniffing around English football for about the last seven or eight years and made one tentative bid for a Premier League club a few years ago.
"The interest in Reading comes from his son who went to college and university in the town."
Brady warned Reading fans not to expect multi-million pound signings, and said he expects the club to continue being run prudently.
"Reading is very well run and very prudently run but they have a few problems," added Brady.
"They only have a 25,000 seater stadium, it is not a large stadium. This is a great Championship club, which is a very good investment for somebody who loves football."
Graeme Murty - who captained the club into the Premier League - warned the Royals must continue to be sustainable and said the fans would want assurances of that.
"Let's not forget the job that Sir John has done in making the club financially secure," Murty told BBC Radio Berkshire.
"He wants the club to go forward and progress and back in the Premier League and I think that is why he has done what he has done.
"Sir John has always said he is looking for someone with deep pockets to do what he couldn't do himself and I think he deserves a lot of respect for saying that.
"We don't want to see a lot of debt at Reading and the fans just want reassurances of that. The club has to be sustainable."