First fixer!!

[Ian Broadie]

I'm negotiating my first fixer, and the cost is getting higher than I had originally bargained for.... It's a tiny 850 sq ft bungalow on the water for a great price, but there is a huge crack in the foundation. Like 2 inches thick kinda deal. The home is a century old and I want renovate the entire interior. I have about $40k for all of this, but I'm estimating it will cost about $30k for everything I want to do. I did some quick searches online and found $5-10k should be adequate to fix major foundation issues, but because it's on the edge of my budget I wanted to reach out and ask what experience has taught you. Also, the floor of the home isn't level (assumedly due to the foundation). Does anyone have any sort of idea what this might cost and the implications it might have? I have an additional $20k in reserves just in case the world falls down around me, but I don't want to break into that. Thank you so much for any input!