Instead of buying a part of the company, and ICO gives an investor the ability to use the coins they buy on the the platform the company owns. (cambridgehouse.com)
Another cost - cutting idea is using scrap wood, so make sure you collect all of the unused wood you can before you start buying parts for the wind tunnel. (sciencebuddies.org)
Just bought the parts from them and watch videos online and fix them properly. (humblemechanic.com)