I have to suggest that you consult with a tax professional in your area.
See https://www.naea.org/
Your transaction could qualify (and you would be required to report as such unless you elect out) for installment sale treatment provided the sale was at a gain and did not involve the sale of inventory and there was no depreciation recapture (the latter must be reported in the year of the sale).
See https://www.irs.gov/taxtopics/tc705
