Been focusing on this and another small patch for about 2 years. The up front work was a bear, just to get rid of the grass down to the root (those fuckers are DEEP) and get all the plants established during the right seasons. I’ve also installed a drip irrigation system that can compensate for some of our really dry periods during summer, which took a full weekend. Once the plants are in and mulch is down, really the only maintenance is keeping bermuda and sedge from popping back up. The first year required extensive weeding every month or two, but the second year has required very little because most of the soil is totally shaded out. It kinda supports itself now. My only problem at this stage is that the liriope border was pre-existing, so bermuda still spills out from existing root stock from that area, which means I have to more aggressively weed/trim that border. I benefit from the walkway being a natural barrier for encroachment from the rest of the lawn, but it’ll still take another year or two before the bermuda is totally neutralized.