I am buying someone out and I need to know what my rights are.

I Purchased a condo with my partner in Florida in 2009. He put in 75% and I put in 25% on the sale. In the 11 years that we lived here I paid 50% of the HOA taxes and insurance. In 2020 he got sick and needed to move to New Jersey to be with his daughter. Now his son wants me to buy him out at 75%. I’m telling him that I paid 50% not 25% all these years for the above bills. He says he can take me to court to get the full amount. I need to know if it’s worth it to just give him what he wants or settle it in court.