Dude, I can’t imagine how much effort and money you have already spent on this! Once I also thought about building a geodesic dome, but after making calculations I realized that it was very expensive for me. I hope you succeed! Good luck
Its actually quite cheap since ive used raw wood boards(cheapest wood) that i cut myself on length to make the struts.
The wood costed @ 400-500 dollars because i had a lot of losses( bad wood with knots,somme curled after they dryed,etc).
Cement for the foundations ,just a few bags.The foundations dont have metal reinforcements in them but i mixed the cement to be on the harder side with slightly more cement than normal.@ 30 dollars
The exterior policarbonate ,4 mm thick and double walled costs @ 400 dollars and the interior polycarbonate another 300 dollars or so.
On screws and anchors i spend probably 200 dollars or slightly more and on aluminum tape another 200 probably.
Total cost @ 1500 dollars for 50 square meters and 4 meters tall .But i didnt calculated the labour.
If you like geodesic domes and want to have one thats even cheaper than mein,then ZipTieDomes has somme kits lately made with pvc plastic pipes and a special connector on them where you can attach greenhouse foil on exterior and on interior and that seals it well from cold( better cold sealed than my dome actually).
https://youtu.be/CMsRCiYZl0AMy dome is hubless wich is a lot harder to build than one with hubs ( visible joints).But domes with hubs and with plastic foil are just as beautifull as mein ,just make it bigger to look good and 3v or 4v frequency.
Warning: do not install the dome right next to a busy road because it will cause accidents from drivers looking at the dome instead of the road
.