A purchase plus loan is not really mentioned in the guidance, but if you have an "as completed" appraisal that does not over value the market value of the improvements and you are controlling the disbursements and have additional collateral (you don't say what this collateral might be or of what value), then I would think you would be fine as long as you remain under 90% for the duration of the project.
I would see this similar to a multiple phase real estate project.
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