Talmud for Moed Katan 2:4
אֵין לוֹקְחִין בָּתִּים, עֲבָדִים וּבְהֵמָה, אֶלָּא לְצֹרֶךְ הַמּוֹעֵד, אוֹ לְצֹרֶךְ הַמּוֹכֵר, שֶׁאֵין לוֹ מַה יֹּאכָל. אֵין מְפַנִּין מִבַּיִת לְבַיִת, אֲבָל מְפַנֶּה הוּא לַחֲצֵרוֹ. אֵין מְבִיאִין כֵּלִים מִבֵּית הָאֻמָּן. וְאִם חוֹשֵׁשׁ לָהֶם, מְפַנָּן לְחָצֵר אַחֶרֶת:
It is forbidden to buy houses, bondsmen, and beasts except for the needs of the [buyer] on Chol Hamoed, [i.e., a house to dwell in, a bondsman to serve him, beasts to slaughter], or for the needs of the seller, who does not have what to eat, [and who needs the money for yom tov expenses.] It is forbidden to remove [vessels or produce] from one house to another [that is far from it, because of (the interdict against) undue exertion], but it is permitted to remove it into his courtyard [i.e., into a different house in the same courtyard, this being "discreet"; but not from one house to another by way of the public domain.] It is forbidden to bring articles from the artisan's house, [articles which are not needed for Chol Hamoed; but it is permitted to bring those which are needed, e.g., mattresses, cushions, cups, ladles, etc.]. And if he fears for them [that they might be stolen from the artisan's house, or if the artisan needs his wage and the owner of the article does not trust him (to leave the article there), fearing that he might ask to be paid a second time], he removes them to a different courtyard.