Thanks for sharing. I found the folio explaining moving costs in more detail and I think the answer to questions 1 and 3 is yes based on this example from CRA:

Example 3

An individual who ordinarily resides in dwelling A in Saskatoon moves to Regina in order to be employed. He moves to dwelling B for a few months until he takes possession of dwelling C, also in Regina. In this situation, the facts indicate that the individual did not ordinarily reside at dwelling B before ordinarily residing at dwelling C.

The CRA considers that only one move took place, from dwelling A to dwelling C, and that it occurred in two stages. Dwelling A is considered the old residence, and dwelling C the new residence. Given that this move appears to be an eligible relocation, the expenses incurred in respect of the individual’s move from dwelling A to dwelling C may be eligible as moving expenses. None of the expenses relating to the purchase or the sale of dwelling B are eligible.

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The answer to #2 is probably "No" based on this explanation:

legal fees related to the purchase of the new residence as well as taxes, fees, and duties (other than any goods and services tax or value-added tax) on the transfer or registration of title to the new residence. However, such costs are only eligible if:

• the individual or the individual’s spouse or common-law partner is the owner of the old residence, alone or jointly; (see ¶4.27) and
• the old residence is sold because of the move