What is the definition of "Ir Chomah"?
Rashi: It is a town that had a surrounding wall from the days of Yehoshua bin Nun. 1
What is the smallest size house that the owner may redeem only up to a year?
Sukah, 2b: A room 1 of four by four by four Amos. Less than that does not fall under the category of 'Bayis' and goes back to the owner in the Yovel.
In many contexts, Bayis' means a room.
What are the implications of the words "Beis Moshav Ir Chomah"?
Erchinm 33a: It implies a. that the town became inhabited after it was walled; 1 b. Via a Gezeirah Shavah, "Chomah"" Chomah", from Devarim, 3:5 "Kol Eileh Arim Betzoros Chomah", that it was walled by Nochrim. 2
What distinction does the Torah draw between the sale of a field and the sale of a house in a walled town?
Rashi: Whereas the former may redeem his field after two years, the latter may only redeem his house during the first year, but not afterwards.
What are the implications of "Vehaysah Ge'ulaso ad Tom Sh'nas Mimkaro"?
Erchin, 31b: It implies a. that, if the owner dies, his son is nevertheless permitted to redeem the field in place of his father, 1 and that, if the purchaser dies, the owner is permitted to redeem it from his son; b. If the purchaser dies, the owner is permitted to redeem the field from his son. 2
Why does the Torah permit the owner to redeem a house in an open town until the Yovel ? like fields, but a house in a walled town for only one year?
Ramban and Moshav Zekeinim: Because on the one hand, selling a house is initially difficult and embarrasing for the owner; therefore the Torah allows him to redeem it within a year. However, having sold it and not redeemed it within the year, he has evidently despaired of redeeming it and the sale becomes permanent. 1 A house in an open town on the other hand, 2 which also serves to guard one's fields, has the same Din as the fields. 3
Torah Temimah: Because if, in the case of a waaled town, he has not redeemed it within a year, he has probably found another house and is no longer interested in returning to the first one - as opposed to a house in an open town, which is attached to a field and is part of the seller's inheritance
Torah Temimah, note 149: Or because he has settled down in his new house and no longer pines for the old one. Perhaps the Torah is also concerned that people will be loathe to purchase a houses if the seller can redeem it at any time (PF).
Which, as opposed to one in a walled town, is located near his field.
Why does the Torah add the 'Vav' at the end of "Sh'nas Mimkaro"?
Targum Onkelos and Targum Yonasan: Because it implies a full year from day to day, 1 and not until the end of the year (Erev Rosh ha'Shanah). 2
Da'as Zekenim: Because this Parshah alludes to Hashem, who 'sold Eretz Yisrael to the Kasdim (the Babylonians)' for seventy years (due to the seventy Sh'mitah years that Yisrael did not observe). At the end of that period, He will redeem the sale (return the land to Yisrael). 3
What are the connotations of the word "Yamim" when it is not accompanied by a number?
Rashi, Targum Onkelos and Targum Yonasan: It means 'a complete year' 1 (Me'eis Le'eis ? Erchin, 31a). 2
Rashi: Like we find in Chayei Sarah, Bereishis 24:55.
At the same time of day on the same date the following year. See Torah Temimah, note 150.
