Quote 4
PETRUCHIO
Now, for my life, Hortensio fears his widow! (5.2.16)
Petruchio's comment about his friend Hortensio says a lot about the way men interact and give each other a hard time in the play. The comment is made in good fun but there's also a lot of truth in the statement, which suggests that Petruchio enjoys dominating his male friends just as much as he enjoys ruling over his wife.
Quote 5
PETRUCHIO
Well, I say no. And therefore, for assurance
Let's each one send unto his wife,
And he whose wife is most obedient
To come at first when he doth send for her
Shall win the wager which we will propose. (5.2.67-71)
Hefty dowries aren't the only systems in which wives can be little money machines. Petruchio's wager on his wife's obedience suggests that women are always seen as cash cows.
Quote 6
PETRUCHIO
I come to wive it wealthily in Padua;
If wealthily, then happily in Padua. (1.2.76-77)
Although crude and offensive, Petruchio is completely up front and open about his fortune-seeking ways. Marriage brings happiness, not for love's sake, but because marrying a wealthy wife brings in a lot of cash, which, according to Petruchio, is happiness.