While there are many possible approaches to answering this question, I am focused on creating utilities as a public commons. Utilities, such as Broadband Internet and electricity are for the most part, extractive in nature, whereas putting up your own solar panels, or creating community owned Internet infrastructure is regenerative, and helps to build a circular economy.
Creating one’s own electricity/power can be an expensive investment to begin with, but can save money in the longrun. Having community businesses, of which some or all income generated goes into running the community and keeping costs down can help lower the amount each individual must pay. Another option is to have both buy-in options and rental options, that way people of varying economic abilities can all participate.