This is correct. You may consult Article 25 of the Immigration Act to read more on circumstances that cause you not to qualify for permanent residence.
I am not sure whether that is the best way, but it is a way.
Bear in mind that you will still need to meet the statutory requirements of both an ARC issued for this purpose as well an APRC five years later. Particularly the latter will require you to submit proof of income greater twice the minimum income. Generally speaking, that means you would need to declare close to 50,000 NT$ per month as income to the tax office to make sure you can get a tax statement to document your income. I am not sure whether the NIA would accept (foreign) account statements with income in that range instead of a tax statement. Your only way to avoid this would be to marry a local at some point before you apply for permanent residence.
Also, keep in mind that there will be expense related to setting up your corporate structure and maintaining it, too.