Four Jewish brothers

Four Jewish brothers left home for college: one became a lawyer, one a doctor, one a hedge find operator, and one a retailer. They all prospered. 
Some years later, chatting after a Chanukah dinner, they discussed the gifts that they were able to give to their elderly mother.
The first said, "I had a big house built for Mama." 
The second said, "I had a hundred thousand dollar theater built in the house." 
The third said, "I had my Mercedes dealer deliver her a 600SL with a chauffeur." 
The fourth said, "Listen to this. You know how Mama loves reading the Torah and you know she can't see very well. I sent her a parrot that can recite the entire Torah. It took twenty rabbis 12 years to teach him." 
"I had to pledge to contribute $100,000 a year for twenty years but it was worth it. Mama just has to name the chapter and verse and the parrot will recite it." 
Soon thereafter, Mom sent out her Thank You notes. She wrote:
"Milton, the house you built is so huge. I only live in one room, but I have to clean the whole house. Thanks so much."
"Marvin, I am too old to travel. I stay home. I have my groceries delivered, so I never use the Mercedes... And the driver is a Nazi. A million thanks."
"Menachem, you give me a theater with Dolby sound, it could hold 50 people, but all my friends are dead, I've lost my hearing and I'm nearly blind. Thanks anyway."
"Dearest Melvin, you were the only son to have good sense to give a little thought to your gift." 
"The chicken was delicious."