307 Mansion View Loop Enjoy the Benefits of Home Ownership Without the Maintenance. Riverside Crossing is Montana's FIRST cooperative housing project designed for active adults 55+. You have 7 floorplans ranging from 684 sq ft to 1601 sq ft single story and two-story "cottages" with amenities such as a Common House for parties, meetings, and get-togethers, common gardens, pathways and a host of other benefits. Call for details and advantages of a "pocket neighborhood." And if this is not what you're looking for, we can go out and find unlisted and premarket homes that meet exactly what you want. The great thing about these is that no one else is even aware that they are available. You can often negotiate things like contingencies to sell your house before closing.