Young and creative? Rather unrealistic,... No matter what kind of construction – you have to apply for it. To do that, you need someone who takes responsibility (and is allowed to take it). That will already cost you money, and the authorized signatory will need a structural engineer for the building application – which costs money again. No one will sign off on any steel beams for you,... Requirements are also imposed on commercial properties (depending on the development plan). Appearance, structure, emission values, etc. You quickly need 3 or 4 expert reports, and it gets really expensive.