Oh it's another one of those, "My wife died so I became an asshole to everyone including my offspring.". What a sob story.
So let me get this straight: you want to exploit the dungeon to get revenge and make it so your wife's sacrifice wasn't in vain in making the village prosper. Bro get that shit out of here, its your dumb decision to stay around a dungeon cause you can't let go of your hometown. There's also a constant number of people dying going through the dungeon without clearing it, making the dungeon ecosystem evolve.