To Refinance or Borrow Against? That is the question

So I have been thinking lately about my home. We have lived at our current residence for about six years and I absolutely love it! We rented the home at first and then bought it about 4 years later. We have almost finished all our remodels and I believe if we were to sell now we could make a profit of around 10 to 15 thousand--our area has sold quite a few homes and also grown. So eventually we will be moving to the land where i grew up and building. We will inherit that land when my pawpaw passes. So i would love to have a lot of equity in my home to be able to build the house of our dreams. So our current home needs new windows, a few other minor changes. I believe i could do everything for about $3,000. So my question is do I borrow against our equity to pay for the changes or do i just refinance and then save money with the extra since our payment will be lowered? This is our first home and I have learned a lot but i really want to think about my decision before i make it. any suggestions or feedback would be GREAT.