@erikhedberg wrote:
.....Because of this sale, I am looking at a $70K tax bill for 2020.
Based upon the facts you stated in your posts, you are looking at a $70,000 gain (maximum) for 2020, not a $70,000 income tax bill - and that gain is long-term which is taxed a more favorable rates.
Moreover, do not forget the cost of the land improvements that you made which add to your basis.
