You can do very low cost rotating gravity if you don't mind some of the downsides. Eq. you can basically split your craft to 2 pieces of ~same weight, connect them with cables and have them rotate around the shared center of mass in the middle.

This scales from two tiny one-person capsules up big habitats, until you end up hitting structural limits of available materials for the cables.

Might be less practical than a full rotating ring, but should be much cheaper & more flexible - you can just winch the cables in and out to regulate gravity or switch back to a combined zero gravity configuration.

The main issue being moving stuff between the two sections - but if you put cargo, fuel, power supply, etc in one section & living space in the other, it should be fine. Or you can have some crawlers going back and forth via the cables.