The Tsi-Akim Maidu tribe is moving its home base from Grass Valley to Nevada City and will open an adjoining thrift store to pay for its new space. The thrift shop will be the tribe's first economic development project. In the past, the tribe paid its bills, including rent space, with money collected from fundraisers held throughout the year. The shop will open during a grand opening ceremony on Sunday, Feb. 11, with food, drink, traditional drumming, singing and a circle dance in the office parking lot located at 548 Searls Ave. The new space will triple the size of …