If you're willing to do maintenance, get a resller hosting account and sign people up for hosting on it. Or just get cheap hosting somewhere. Something that would be maintained for you (e.g. shared hosting). Then it also becomes a source of [mostly] passive income.
Then you would be able to do whatever type of sites you want. Like others have said, static sites of some sort. Learn a common templating engine and javascript so you can work with a bundler like Webpack that will do some automation for you.