My siblings and I inherited a small house and I ended up buying them out for a total of $6,000. I renovated the house and sold it. Can I add the $6,000 to calculate FMV?

The house was in disrepair and we renovated it. I know I can add the FMV, renovation costs, and realtor/broker commission when calculating the cost basis for the home, but can I add the amount I spent buying out my brother and sister to take full ownership of the house?