Simple wills are most often used when all that is needed is course on the way to distribute easy assets from the estate to the beneficiaries. As long as the nature of the assets is relatively uncomplicated, a simple will is greater than probably enough to do the job.
However, complicated estates can take up to two and a half years or longer. Several factors are concerned, each with their own deadlines. The executor is liable for filing the decedent's final tax returns and paying any taxes owed from the property. The executor is also answerable for any property taxes when due. Estate taxes are only relevant to very large estates -- in extra of $5 million.
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