When your relative’s will was admitted to probate, it may have been mentioned in the newspaper. That could be a way to at least find out what is in the document if the originals are difficult to access or no longer extant–or just so you know what is in it before you get it.
The will of Harry Cheney was mentioned in the Decatur, Illinois, newspaper after it had been admitted to probate by the court in 1926. It mentions his wife (Ada), his son (Harry), and two relatives (nephew Charles Chamblin and niece Ida Benedict) who are to receive the balance of the estate if the son dies without issue.
Check out my 1950 census preparation webinar-1 April is coming up!