4k on that HW. Shipping date is Jan 25-30. I would assume it arrives mid or end of Feb?
Even if the device pays for itself in a month the returns will only keep on dropping.
Why not buy 14-15 RX 570/RX580 mine at 13k cryptonight ~ 1.8-2k per month and keep switching coins. Sure returns would be slower but you get consistency and also resell hw if you decide to stop mining.