The pasuk says: וה' ברך את אברהם בכל – “Hashem blessed Avraham with everything.” There are several translations of the word בכל, everything. The Medrash states that בכל, “everything” is the mitzvah succah. This means that when one has the mitzvah of succah, he possesses everything. Hashem blessed Avraham with the mitzvah of succah; therefore, Avraham had everything.
What is the explanation? Why does having a succah equate to having everything?
The Chozeh of Lublin (Avnei Zikoron 662) zt”l explains that the succah reminds us of the vainness of luxuries. They are not as significant as we perceive them to be. We discover that we can live in a hut for seven days, and it is fine and comfortable. We learn that it is feasible to be content with less. When we know this, we have everything. Even a person with few physical possessions can feel satisfied with his lot. But when one thinks he needs more and can't live without luxuries, he never feels he has everything. He always feels that he lacks something. He needs a new kitchen and a new car; the old one isn't good enough for him. He is never satisfied.
Be aware: Living a luxurious life doesn't mean leading a happier life than those with less. So, you have a beautiful chandelier in the hallway and go on exotic vacations once or twice a year. The person down the street who can't afford these things can be just as happy with his life, and often he is even happier.
Every person has different needs, but one thing is certain: If you aren't happy with your portion, traveling and buying expensive items won't resolve your problems. You can tour the world, live in a beautiful mansion, and still be miserable. But if you are happy with your lot, you have everything, no matter what you have or do. That is the berachah that Hashem gave Avraham. He blessed him with בכל, everything. This is the lesson we learn from succah, and this is how Hashem gave Avraham "everything." (Torah Wellsprings)
