Isn’t this the perfect scenario for using a crowdfunded solution?
If you consider “forever” to be 100 years for a person, you could charge 1k upfront, and you would need 5000 people to be able to maintain it.
$250 000 first year and $52 500 in following years = 91 years until the money runs out. Of course there is no doubt other costs involved, but you'd make it past a year.
