It is hard to tell if you are joking here or not, but in case you are not: if the cost of mining is low, the value of mining is also low. The reason for having 'mining' in Bitcoin is to artificially create scarcity in order to simulate blocks having real-world value.
If you can mine blocks for free, the value of each block plummets.
If you can mine blocks for free, the value of each block plummets.