Rehab cost for addition to home

[Silas Lambert]

I'm a young investor who fell in love with real estate fresh out of high school. Instead of jumping into it early and getting into thousands of dollars of debt, took an alternate route and did my homework for 3 years before diving into my career and dreams as an investor. I am curious to how much to budget for a 500+ sq fr addition to a property. I haven't done a huge rehab like this, so I wanted to seek out some mentoring for any advice on this type of deal.