1. I know a farming sim game, Village Monsters is doing early access and they generally update within a specific time frame and basically post on twitter/ game's discord when they update or having something new to show the players what's in store for the new update in case that's stuff not working properly code wise. Not sure if that you're willing to do but it's an option to make money and produce the game without having to worry about paying the bills or something.
2. Glitched, a rpg didn't really do early access except allow certain players to buy stuff during a Kickstarter to have exclusive access to early builds/demos if they paid extra for it while offering steam keys too from what I remember And I think they made longer demos for the rest of the player base after a few months or so while ironing out the kinks and stuff. You could do something like that if you're up for it but it's up to you.
Don't view it as taking money from people but us paying you extra to have you be able to work on the game without having to worry about juggling stuff or stressing out. And having the player base offering suggestions to make the game better as you make the game. Or view it as getting paid extra while being given more work to do on your game if you view that way.
3. I say a bit more because of multiple routes and stuff but I have no idea how long you're making the game. Twenty bucks or twenty five if the game is longer than thirty hours or so.