510 had a good start since she's the only one who tried to build a foundation for her tower at the beginning (her logic is not bad ga!!! just somehow got deviated later on). Yanny's approach is a guyed tower and I think that's probably the best way to do it too. It's hard to do a self-standing tower with the given material. Another alternative is to build a pyramid-like structure but more time is needed. I would go for the guyed tower just like Yanny :D