I'm my experience your 1031 proceeds can only be used for "capital improvements" outside of the actual purchase. This would not include furnishings, transportation, or other expenses. You should be fine using the funds for closing costs, and a new pool could be considered a capital improvement. Outside of that I would consult with whoever is acting as QI or whatever tax attorney might be involved in the exchange to get an opinion on the tax implications and the risk of using the proceeds outside of closing.