I'm not sure about Leipzig's income and the owners of this team but I know Leipzig had a perfect performance the last season and they got the third place in the table while because of the mistakes from both Dortmund and Bayern Munich, they could even race for the title with these two teams, but since Leipzig is going to play in the next champions league I think they should invest more for their team and improve themselves.
RB Leipzig was completely prepared to compete with the bundesliga's two premier clubs, and I believe their prior performance has boosted their strength to challenge for the season league title next season. RB Leipzig will compete in the UEFA Champions League next season, and all of the players will have to buckle up and confront a new set of challenges. It will undoubtedly be a competitive environment for both the players and the coach. Marco Rose, the Red Bulls coach, is always ready to accept new difficulties and figure out how to solve them without hesitation.
For the current conditions I think Leipzig will still be the same as before with a little trouble at the beginning of the season but slowly moving and getting a decent position.
Seeing from their conditions the last few seasons have always been like that and do not rule out the possibility for this season too.
On the other hand, we also know that they are currently losing several players who left such as Konrad Laimer who was allowed to leave for free to Bayern and Nkunku who currently belongs to Chelsea. This will certainly have an impact where we know that these two players have always been the core of Leipzig and losing these 2 players will provide a void in the team.