I'd definitely be in favour of owners being allowed to put in their own money if they want. They have to be legally liable for any overspending on coaching/playing staff that takes spending above 95% of the club's income and the money has to be put in a 3rd party account upfront.
If they decide they want to sell up, then the buying party has to agree to cover the budget in place.
Obviously it's more complex than I'm making it sound, but something like that would be fine by me. What I'm not a fan of is my club losing 50-100 million a year "cuz we had to have a go"
If you only define success as winning, rather than being able to compete to your best, within your means, then you're going to be disappointed a lot of the time.