According to Shelter Structures, a specialist company in mobile and modular space solutions, here are some things to consider before building geodesic domes: 

Consider the purpose and diameter of your dome house before buying a geodesic dome kit. Domes above 20 meters are great for large-scale social gatherings, events, and art exhibitions, while 10-20 meter domes work best for small concerts, outdoor weddings, and corporate events. Geodesic domes below 10 meters are suitable for greenhouses, Airbnbs, hotels, campgrounds, and workspaces. 
Your budget is crucial as it determines dome homes' size, design, and quality. Geodesic domes below 10 m are more affordable for those with limited budgets.
You must also use high-quality materials like PVC, polycarbonate, and pre-drilled frame tubes. Ensure that everything is labeled correctly and that you have all you need. You'll need tools like thick ropes, a tape measure, a step ladder, electric and adjustable wrenches, and a utility knife. You'll also need a hammer drill if the structure is on a concrete foundation.
Consider the local building regulations and permits you might need. There are varying zoning laws and building codes that can affect your construction. Ensure you have all necessary permits to avoid unnecessary stress.