It would cost me about £11/month to run. For context, I currently pay ~£80/month for electricity (UK average is ~£60[1]). Not prohibitive, but it's a pretty sizeable increase. When you consider I can get 4G connectivity[2] for £22/month, with significantly less power consumption,, it doesn't seem that attractive unless you have no other options.

[1] Table 2.2.1 https://www.gov.uk/government/statistical-data-sets/annual-d...

[2] Claiming typical down speeds of 50Mbps-100Mbps