Dream big enough that your whole block benefits.

A goal aimed only at your own comfort has a low ceiling, because there is a limit to how much one person can use. Scaling it up to include the people around you changes what you build and who helps you build it. It also makes the effort survivable on the days your own motivation runs out.

Take whatever you are working toward and ask what it would look like if it worked for fifty people instead of one. Some of those versions are impractical, and one of them probably is not. Choose the larger shape when the cost is close to the same.