1)
What is the meaning of "u'Va Mis'halech Reishech?
1.
Rashi: Matters that you are poor from them, they will come to you quickly.
2.
Malbim: Reish (poverty) comes without strength, like one who walks.
2)
What is the significance of "u'Machsorecha k'Ish Magen"?
1.
Malbim: Deficiencies that will come after poverty, come with a sword and spear and strength, like a protector. You will fight against deficiency that will irk you, but he will wear a shield, and you cannot defeat him.