What is the ruling on applying for Hajj without knowing the final price, and what is the ruling on "istita'ah" (ability) in this case?

This transaction involves excessive gharar (uncertainty) and jahalah (ignorance) regarding the price or rent, which renders the contract invalid according to the majority of jurists. Some scholars, like Ibn Taymiyyah, held the view that the transaction is valid if the price eventually becomes known and does not lead to dispute. This view can accommodate people now if there is a mechanism to control the price. As for istita'ah (ability to afford), it relies on a strong presumption in estimating the total expected cost. So, whoever is able to afford it is considered mustati' (able), and if not, then not, and he should not risk his money.