I recently got a notice from the city about Critical test exam report on a 3 storey porch, does anyone know a good structural engineer that can do this and how much does it cost?

Does anyone have a structural engineer they recommend working with on this project?

The property is in the flood zone or the physical structure, the home, is in the flood zone.

I'm still not entirely convinced it's possible, but it's what I'm basing all my other planning/structuring around! 

You can structure it however you and your partner wish. 

If you are looking at lenders structuring loan as a business purpose loan that would mean they also don’t follow standard Respa-tila guidelines that are standard for residential and some other commercial loans.

I had a structural engineer check out the foundation etc. out and it is structurally sound.  

Looking for advice on ways to structure this type of arrangement with my parents (examples being I could put the property under an LLC and have them be my “tenants” or I could take a home equity loan without having to sell the home) or any other type of scenarios that could be mutually beneficial. 

Since the funds in the account is not enough to cover the construction cost, we are looking at best option to structure the deal. 

There are a myriad of ways to structure acquisitions, only limited by your creativity.