Legal Alien: A Scotsman in Montreal

 
Friday Fun

Gertie just came from the office of her dear departed aunt's lawyer. She was told that her aunt (who loved language teasers) left her a certain amount of money in US Dollars. The lawyer explained that according to the terms of her aunt's Last Will and Testament, Gertie will get fifty times the original amount bequethed if she could correctly guess the amount left her by midnight tomorrow. "God, that would be thousands of dollars if you succeed," the lawyer said as he handed her a note from her aunt. It read:

RAIN RIDDLE: OLD ASTRONOMY HOST ALLOWS ABLE LASS ENTRY IN OWN LAND ESTATE. Love Aunt Alley.

Question: How many thousand dollars did her millionaire aunt left Gertie?