Mariana's place is the perfect crash pad for the solo traveler.
It's in North Shore, close to hanakapiai trail, queen's bath, and a few beaches. My favorite food spots close by was Foodlands and any place in Ching Young Village. It's an easy drive back to East Shore and worth the drive to South Shore for touristy things (Waimea Canyon, Sprouting Horn, etc.).
Definitely would come back solo or a significant other. Would not recommend for non-close friends. Space can be tight.