https://www.asicminervalue.com/miners/bitmain/antminer-z9
look at "where to buy"

check out ROI column

answer is :
Probably not at current prices and current value of Equihash coins!
Don't know if network hashrate and difficulty will continue up like crazy as the last couple of weeks!

https://www.coinwarz.com/cryptocurrency
https://www.coinwarz.com/charts/difficulty-charts
https://www.coinwarz.com/charts/network-hashrate-charts