Moving forward in dating

I have an honest question. There's a woman I like but she has 2 kids to another man.. my long term goal is to have 4 biological kids of my own. I don't have a college degree or whatever. I make 20$ an hour in a pretty low cost of living area in pa. She's a stay at home mom... is this even possible? Every woman i meet in my home town has kids... dating is.. frustrating. Because I figured I'd settle, mary, you know. The American dream. But more so.. feels it's more and more outa sight to have kids of my own. Doomed to be a stepdad. How to make the best of it to achieve the family I want to have.. her current home is maxed so I'd have to buy a large house to even begin thinking about it.. my grandmother had 7 kids on her husband's one income. It feels like today woman max out at 2-3.. so being a step parent really wrecks your chances at a big family.. (yours) Any tips navigating this?