The point of self hosting is not to engage people going in your server. The point of self hosting is to have control over your infrastructure. It’s like renting or buying a home.
When you buy a home, you don’t complain that no one wants to sleep in your home 😆
Meshroom is FOSS, relatively easy to use and works out of the box. It is industrial quality and is widely used in cinema and untertainment industry. So, I think it’s the go to if you want something robust and usable.
NVidia provide several reasearch software to do Radiance Field stuff on their github: https://github.com/NVlabs. They gives impressive results, but none of them is user friendly. It’s reasearch stuff.