Selling Poverty

My brother in law had kidney failure, but he did not want to have treatment because he wanted to save money to make donations for the kathin ceremony at the hometown temple. He said that my sister wanted to make a donation for this kathin ceremony but she died before she could do it. He was afraid that when he wanted to make a donation, he would also die before having the opportunity. Why is it so difficult to make this merit? "You can see that we have to make merit quickly. We should not wait."