a world without rent entirely is a really stupid idea that only ever seems uttered and promoted by Tankies
Meanwhile, in the USSR, nobody owned housing privately, most housing was accessed through the work union, and was rented at about 3% of monthly costs. You clearly, CLEARLY haven't ever engaged with a Tankie (such as myself) on the topic of housing.
I edited my comment and added the second paragraph, not your fault you didn't see it :)
Communism doesn't actually say anything about wanting everyone's income equal, I've only seen this claim by anticommunists before. Communists simply believe that people should earn according to their labor, and not according to the exploitation of others' labor. For example, the Soviet Union had widespread use of work quotas which, when exceeded, granted workers a higher wage. As an example, the Stakhanovite movement did wide promotion of work effectiveness and of rewarding exemplary workers, both through monetary and through social incentives.
I personally don't believe there's much place for capitalism at all, but that's a very deep ideological topic that's far beyond the scope of this post. If you're interested on discussing this, however, I'm very open to this topic!