The "closing" is done at the end of the transaction, the execution of both parties signing the purchase agreement is the initial step in the transaction. Between those two points the modular home is built (if not already completed), an appraisal is done, a title report is checked, amongst your income, assets and credit being checked out by the mortgage lender (hopefully you'll have the lender check yourself out before you make the offer, called getting pre-approved). Modular homes on average take 60-90 days to complete, and if the loan is already in process during that time, shouldn't take more than a few days to a week to close on it after completion.
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