This isnt bad idea. I think that this option should be for everyone, not just for big arenas, while it would lineary count with lower prices (20000 arena offers bigger "culture" realisations than 5000). And it could be called somehow universally (which I dont know, because of my english) - the point is that you will offer your space to your town for concerts, arts, ladies fight in chocolate slime or whatever..
The question is how the financial issue would looke like. I think that we have 3 possible options:
You will invest your money (example 500 000) for a season to the company that will clean up stadium and move scenes for you, while you will earn from the town every week 50 000 as a loan. (so you will earn something, while you spent the money earlier)
You will get the money (example 500 000) at the start, while you have to pay every week 50 000 for the issues above. (so you will have money at the start, but in fact you will lose something)
You will invest in decades - every month (while you can choose every month what you will do, but you will not get so much by one or the other way, because companies will not hold on or give you money for that long)
And everyone can choose which of these 3 options at the beginning of the season will pick up or none of them.