Is it obligatory to purchase water if the price is significant but does not ruin the person's wealth?

Primary text

Regarding a situation where water is sold at a significant price that does not cause ruin to one's wealth, there are two differing opinions. One supports the obligation to purchase, citing the capacity to acquire the water as equivalent to possessing it, thus preventing recourse to the substitute (tayammum) based on Quran 5:6. The other view states it is not obligatory because incurring a significant financial burden constitutes harm, similar to fearing a robber taking that amount.