Not sure I understand what you mean, you only have 1 730k which you've borrowed. Interest rates are a drop in the bucket (~4%) compared to ~25-40% tax rates and that's ignoring asset appreciation (BTC averages ~300% YoY). If you use something like makerdao, you won't even have to pay a single cent of the debt back as long as you borrow conservatively and don't need your collateral back.