I expect a spike to $3-4 for 1KH/s per day over the next week and then slowly go down to settle around $2-$2.50 for 1KH/s per day. That is certainly an improvement from the 0.56 for 1KH/s per day it was just a couple of days ago.

Since ASIC's are now useless and a whole lot of botnet miners are orphaned I don't see the hash rate going alot higher from the current global rate of 145 MH/s:

Difficulty   114.616 G -7.87% in 24 hours
Hashrate   144.596 Mhash/s -81.33% in 24 hours
Monero Mining Profitability   0.6414 USD/Day for 1 KHash/s

https://bitinfocharts.com/monero

Even if the current hash rate doubled to 300 MH/s it would still be significantly less than the 1.1 GH/s it was before the fork. At 300 MH/s Profitability should be 2.05 USD/Day for 1 KHash/s or 366% better than pre-fork.

I can certainly live with that.

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Edit 1: 17:50 CDT 04/07/2018 - Difficulty getting easier and Profitability increasing

Difficulty   93.383 G -27.17% in 24 hours
Hashrate   156.719 Mhash/s -72.85% in 24 hours
Monero Mining Profitability   0.7847 USD/Day for 1 KHash/s

Edit 2: 22:20 CDT 04/07/2018

Difficulty   76.866 G -42.22% in 24 hours
Hashrate   167.254 Mhash/s -55.67% in 24 hours
Monero Mining Profitability   0.9408 USD/Day for 1 KHash/s

Edit 3: 08:24 CDT 04/08/2018

Difficulty   49.093 G -60.68% in 24 hours
Hashrate   190.917 Mhash/s +29.52% in 24 hours
Monero Mining Profitability   1.4867 USD/Day for 1 KHash/s

Edit 4: 12:57 CDT 04/08/2018

Difficulty   38.306 G -64.46% in 24 hours
Hashrate   226.997 Mhash/s +51.65% in 24 hours
Monero Mining Profitability   1.9081 USD/Day for 1 KHash/s

Looks like it will settle around $2-$2.50 for 1KH/s per day without the higher earlier spike since many farms have now moved to mining Monero.

Edit 5: 20:00 CDT 04/08/2018

Difficulty   32.073 G -62.05% in 24 hours
Hashrate   272.847 Mhash/s +68.03% in 24 hours
Monero Mining Profitability   2.3169 USD/Day for 1 KHash/s

Hopefully the Hashrate increases will start to slow down soon

Edit 6: 15:53 CDT 04/09/2018

Difficulty   41.794 G +21.26% in 24 hours
Hashrate   424.229 Mhash/s +72.64% in 24 hours
Monero Mining Profitability   1.658 USD/Day for 1 KHash/s

Well it is beginning to look like you were right in that the flood of farms now mining Monero keep coming. I have yet to see the Hashrate acceleration even decline. I thought 300 MH/s would be the top now I hope 500 MH/s can hold.

Edit 7: 17:44 CDT 04/14/2018

Difficulty   53.898 G +0.54% in 24 hours
Hashrate   459.753 Mhash/s +4.81% in 24 hours
Monero Mining Profitability   1.5033 USD/Day for 1 KHash/s

Thank goodness the 500 MH/s did hold. There was a brief period where it was exceeded but it now has settled into the 450-475 MH/s range