However, he doesnt expect to match the spending power of Sunday's opponents Arsenal anytime soon.
“They definitely said they are all in for the club, that they want to be here for the long term and they want to have success," Frank said.
"That’s, of course, a little bit big headlines. We’ll see what happens in the future, but I’m confident they will back us to do everything we can to build a successful club. It’s very, very difficult to give a specific answer.
"I’m very good at talking up here, but it’s about showing it out there on the pitch consistently after setbacks. The same with them.
"In the best positive way, that’s what we need to do together.”
Asked if he can Spurs paying over £100m for a player just as Arsenal did for Declan Rice two years ago, Frank responded: “In the next 50 years? Then yes!
"It’s very evident that every successful club - not for one year, over five, six, seven years - to build you need a combination of time and doing the processes. Depending on where the team come from, of course.
"But to stay up there is still very difficult. So time and process, and, then of course, investment. If you want success in football, you need to invest in players. Hopefully, do it cleverly and we want to do it smart, so we don’t invest too much on the wrong players.
"But you need to invest. £100m, I don’t know. Let’s see. I don’t think we are close to spending £100m, put it that way way. But I don’t know, let’s see what happens in the future.”