Well if the comminity really wanted a unicycle repair shop everyone chips in to build the shop, and gets the equipment or the state directly decides you need a unicycle repair shop.

Although you and a few of your buddies could decide to make a unicycle repair co-operative. You don't have enough money so. You go to the credit union to get extra starting funds, you then use these funds to contract out the building of the shop as you are unicycle repairers by trade. You then get all the equipment and run it as a co-operative.

There are many ways to run a co-operative and in the begining you and your friends are probably going to split the profits directly using your equal shares to recieve divedends. If it takes off and you start needing to hire people, you may start having salary bands instead so everyone will always make X amount of money working with you depending on their position, but will also make a variable amount from dividends depending on the unicycle repair excess profits and might also have a say in how things are run.

This is a more general left-wing idea which can happen in many left-wing, socialist, and communist societies, rather than just communist.