Wolfsburg and Monaco are examples of clubs having rich owners who initially invested a lot of money but later decided to let the clubs run on their own revenue. Both of them have not been majorly affected by it and are doing quite well.
Wolfsburg have been the third biggest spenders over the past 10 years (behind Leipzig and Bayern), I very much doubt that the club runs on its own and they did so "well" after VW pulled some investment (after Dieselgate) that they would've been relegated if it wasn't for the relegation playoff.
This model just doesn't work in German football culture, because fans don't accept it. Leverkusen for example should be a very likeable club, they strive to play attacking entertaining football, first they imported a shit load of fancy player, Brazilians in particular, (Lucio, Juan, Ze Roberto, Sergio, Emerson, Berbatov) and they had a lot of iconic players, such as Ulf Kirsten (best Bundesliga goalscorer of the 90s I believe), Ballack and Schneider who were the attacking stars of our national team back then and fading Legends like Schuster and Völler. Later they changed their approach towards signing young players and developing them.
They are basically joined second with Dortmund in the Bundesliga table of the past 20 years, they won an European cup, they made it to the CL final in style and should've won a couple of Bundesliga titles along the way.
What a nice club, they must have lots of fans - right? Wrong. Last season they had the same average attendance as Mainz and Augsburg, their next door neighbours Gladbach and Cologne almost double them. Fortuna Düsseldorf, another neighbour, averaged just 2k less. A club that had one top division season in 20 years and only made it back into the second tier in 09/10.
Hoffenheim had their coach publicly complain about their lack of support last season (which happened to be the most successful by far in their history), so did Wolfsburg, when they were playing CL football.
Leipzig
might be the only exception to his, since none of the former DDR clubs managed to stay in Bundesliga after the wall went down, so there is a bit of a vaccuum in eastern Germany. At the same time they are Germany's biggest spenders, even ahead of Bayern, over the past four seasons.
I wouldn't necessarily say these clubs are good for the league either, even if they do well.
First of all Bundesliga tries to sell atmosphere and authenticity and most of these clubs are like the polar opposite of that. Secondly, because they are doomed to be unpopular those clubs stop growing at a certain point, because their success doesn't really translate into sponsorship money and fanbase growth for them. Whereas "proper" clubs could use that success and CL money and grow into a top club.