What is "Motza ha'Susim"?
'Rashi': (It is the source.) He brought horses only from Egypt.
Radak citing his father: One may take horses out of Egypt only with the king's permission; one pays to do so. Pharaoh gave Motza ha'Susim (authority over export of horses) to Shlomo 1 ; Shlomo sold it to merchants for a year, for a known price. They would buy from the king Mikve ha'Motza, i.e. the collection of the entire export. [Shlomo's merchants] were in Egypt and received the price (tax) for taking out horses.
Kli Yakar (Melachim I, 10:28): He did so because Shlomo married his daughter. Shlomo received great wealth from this!
What is "Mikvei [Socharei ha'Melech]"?
'Rashi': It is the gathering [of horse merchants in Egypt].
Radak (Melachim I, 10:28): Mikve is like "Tikvas Chut ha'Shani" (Yehoshua 2:18). Shlomo got horses and linen threads from Egypt. [Also] linen of Egypt is high quality ? "Shesh b'Rikmah mi'Mitzrayim" (Yechezkel 27:7), "Chatuvos Etun Mitzrayim" (Mishlei 7:16).
Malbim: It is where they raise horses. Many horses are gathered there.
Why does Mikvei have an Aleph at the end? In Melachim I, 10:28 it has a Hei at the end!
Radak: Aleph, Hei, Vov and Yud are interchangeable.
Why does it say "bi'Mchir"?
Refer to Melachim I, 10:28:3:1-2.
'Rashi' writes that Shlomo took horses only from Egypt. Below (9:28), it says that he took from all lands!
Malbim: Here discusses the beginning of his kingship, when he had only 1,400 chariots and 12,000 horsemen. Later, he had 4,000 stables; the horses of Egypt did not suffice.
