your understanding of 1031 is inaccurate. if you do a 1031 and want to avoid tax on all gain not only must you not touch the cash but the replacement property must be identified in a written document on or before 45 days after the transfer (sale of the old property) and must be received (purchase of replacement property) within 180 days after the transfer or by the due date including extensions of the tax return for the year of transfer, if earlier.
failure to meet either time limit bars 1031 treatment.
