Carport question

Wifes nephew bought one of those portible garage things from Harbor Freight Tools. !/2 a day to get it erected. # days later the wind took it across the street and 2 doors down. Only stuff under it was riding mower , grille , kids toys, so it found a neighbors car to scratch.
I like my steel shed . 760.00 installed. Enough wind will move it too.
Five years and hasn't happened yet.