I detail here how my first flip essentially bankrupted me which resulted in this house losing money as well.It’s easy to blame others for all that went wrong.

Some questions I would want to answer: Has anything changed in the surrounding soil recently? 

I can envision that the numbers on these luxury homes would lead to to a long lag time...but hopefully I'm wrong. 

Sometimes a sewage line will sag over time due to settling of the surrounding soil.

Beyond the bedrock issue, soil conditions can be costly if the property has problematic soils such as too much silt, deep topsoil, or extensive wetlands.You'll also want to know what ordinances are going to affect your budget - things like tap fees, tree ordinances, storm water retention policies, etc.Bottom line is that you have to investigate ordinances, off-site conditions, and on-site conditions before you can even begin to budget your development.

They run my soil tests for me.

Quote from @Devin James: Quote from @Dominic Mazzarella: Quote from @Devin James: Everything went wrong with this investment:   - Took 4 months longer than expected   - Cost $10K more to build than we anticipated   - Sold for $20K less than we anticipatedWe still profited with a 30% return on equityThis is why I love Real Estate InvestingWhen you do your diligence and stay conservative with your numbers, it takes something really bad to lose money.Here was the original post:My siblings and I are building a home in North Port, FL.Here are the numbers: - Finished Home Value: $412Kish - Land Cost: $19,750.39 - Construction & Permitting Costs: $304,897Additional costs: - Environmental Site Assessment - General Liability Insurance - Builders Risk Insurance - Construction FinancingWe will be listing the home this weekPhotos coming soon!! 

Looks like you guys have a lot of port silt loam, which is NOT a very expansive soil.

Typically with houses of this age - you'll need structural folks to dig and install piers into the soil.

If your house is not build on soil like that, but instead is built on more stable soil types, you probably will have fewer issues as long as the foundation was built properly to begin with.