30s for a boot? Maybe for when windows did some update, but mine is operational within 10 seconds. Also an SSD makes a computer a lot more snappy than a HDD. The benefits aren't just faster boot/load times.... Once you've got a system with a SSD, believe me you don't want back to mechanical drives.
That said, I run with a 1TB NVMe M.2 Intel 600p as the only drive in my system. Considering a NAS for storage purposes.