https://www.ziptiedomes.com/ I like that they provide multiple calculations for various dome sizes. This next link is to a youtube video made by the above company but you will find many other videos on this page also. I found that by watching many videos I got an idea of the 'secrets' these companies use so you think you have to buy everything from them! Of course you would have to be a very expert crafts person because this type of structure does demand precision. Someone suggested building this dome from the top down which might also be doable particularly if you had already built some before. I think this structure might make a good temporary accommodation or tiny house. I made a few ball park cost calculations & realised it is not a cheap method of construction but it is light weight & easy to construct. But not easy to make the components yourself unless you are very precise with your workmanship. A very small error in strut length or hub hole position would throw the whole dome out of whack. Here's another 2 videos where the bloke talks about the pros & cons & shows one construction method as well as the calculator.