You don't say how many hours a week in your time frame you mean to throw at your project or what you believe your skill level to be, so any response is something of a shot in the dark, but it would seem do-able. A mortiser will cut your time per mortise and should be easily sold off when your through.

White Pine in my part of NNE is around .48 to .65 a bdft for standard cairrage lengths

"We build too many walls and not enough bridges" - Isaac Newton

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