Convince me to buy a house

My fiance (no pics, she's a big ole gal, 300 lbs at least) and I have been living together since February in an apartment. My dad called me Friday and said "hey, a friend of mine (the friend is a realtor) and I just got off the phone and he told me about a house that was foreclosed on, fix it up and you could build equity on it and make money off of it once you're ready to put it on the market in a couple years."

Initially, I was inclined to do it. However, after my fiance, my dad's realtor friend, and myself went to look at the house this morning, I saw all it was going to take to fix it up. Needs a new roof, new A/C, new floors, new kitchen appliances, and loads of other cosmetic fixes.

I'm now considerably cooler than I was on the house, I guess it's first time nerves. But my fiance and I hadn't begun to save for a house yet because we didn't plan on starting to look for another six months to a year. She's got a pretty good job, she's a PA, so she makes a pretty decent income. And it'd be nice to not have to pay out the arse monthly for our home.

It's not a very nice house honestly, we're not OT Ballers yet, but it's a starter and it's all we'd need anyway. It's just the amount of renovating that would have to be done to get it to where it's not a dump.

Idk, what says the OT? Needing some outside perspective that's not family.