What is the hash rate required to solo mine an average of 1 Monero Block per day using the current network stats?
Currently the network hashrate is approximately 22.9 MH/s. There are about 30 blocks per hour and 720 blocks per day.
On average to find one block per day you would need 1/720 of the current network hashrate or approximately (22.9 MH/s)/(720) = 31.8 kH/s today. The relationship between MH and kH is found here