Jake has an incredible guest home that has everything you need. I did a solo trip to Kauai, and the amount of space was more than enough. You'll be a 10min walk away from groceries, restaurants, and Poipu beach. The guest home has a modern feel with newer kitchen appliances, laundry, and bathroom. There's even a blender if you're in the mood for a morning smoothie everyday. The surrounding area is very quiet, so you'll sleep in with no noise whatsoever. The TV has all the streaming services if you're interested as well.
During my time there, I would travel to the west side of the island to go hiking in the morning. It's an hour trip from the home with minimal traffic. Head to Kapa'a for great coffee at Java Kai and even more great local shops. This location was perfect for solo traveling and has plenty of room for a couple as well.
All in all, a fantastic place if you're interested in Poipu and the southern half of the island. Mahalo!