I just purchased an old unit, with the intention to renovate, should I wait to get my report once all the renovations have been completed?

No, it is better if you obtain the depreciation schedule before you start renovating so that you can claim on the original plant and equipment included in the sale (as this is revalued from the settlement date) You can then provide your accountant with receipts in order to claim for your renovations or we can create an addendum report to account for this.