Eternabond Roof?

I was recently fixing my rubber roof with some eternabond. I needed to purchase a 12" wide 50'
roll to cover the tear from the edge inward. As I was fixing it, I was wondering if anyone has done their whole roof in eternabond? I've considered some of those spray on roofs, cost is around $5000 for a 30' trailer. Eternabond would be around $2500-3000 for the product, then of course my own labor, so maybe about the same.