Is it permissible for a son (with effort) and his father (with capital and premises) to agree to a Mudarabah, with the profit split 50% for each?

The aforementioned agreement is a Mudarabah (definition) (profit-sharing) with 'urud (goods/articles/commodities), and this is a matter of scholarly disagreement among the jurists. The majority of jurists deem it impermissible, while others have permitted it if the 'urud are valued at the time of the contract. There is no impediment to adopting the view that permits Mudarabah with 'urud, provided that their assessed value constitutes the capital, and the profit is shared equally between you, while the loss is borne solely by the owner of the capital.