It's not just about the tax rate; make sure you properly understand the residency requirements and where your tax domicile will actually be. Many "digital nomad" visas still have an income threshold or require proof of foreign income, so double-check the fine print.
When you're ready to seriously explore options, NewLife.Help (https://newlife.help) has a solid Move Planner and an excellent cost-of-living comparison tool that can help you weigh different paradises against each other.
Canada taxes on residency, and not citizenship. The number of days in the country directly affects your tax obligations.
If you are a dual US/Canadian citizen, than you may still be expected to file a US return or face fines. Similarly, if your business sells products or services to US customers there are transactional and fiscal state-specific grace levels than can trip tax obligations.
Depends how secure your position is I guess... =3