Advice needed: Analyze a deal for redevelopment

[Vivienne Chen]

I'm really interested in the calculators offered on this site. Wondering if any of them are good to analyze redevelopment projects. Let's say I want to buy a land, or property with old existing structure on there, and demolish it. And rebuild condo/duplex on the property and to sell down the road. How can I analyze the deal?  I was thinking about making my own spreadsheet but I don't know the process (new beginner here) to expect what needs to go into the spreadsheet. Would appreciate any advice, guidance, help. Thank you.