Solid wooden or stable core doors will be better at blocking sounds and will look and feel like higher quality. Likewise, new light fixtures can considerably change the feel of your rooms. Or swap out your overhead bedroom lighting for a ceiling fan with a lightweight. Lay down some stepping stones or a small patio to surround the fireplace pit. Pick out some comfy out of doors furniture or, for something slightly extra rustic, build a couple log benches.
Another possibility is that in addition to your current mortgage, you discover a second mortgage, also called a secured cost loan, …