I paid 200 to 300 dollars per hour for International Tax Consultants, that were unable to understand the most common cross country tax scenarios, like "triangular taxation". At the same time, very cheap and experienced "regular accountants" provided, clear, concise and correct advice.
No one actually knows anything about this, save for like 3 people world wide for each country pair.
Lawyers will happily bill you for incorrect advice because their liability is limited to the amount invoiced. But you can end up with massive tax bills based on that bad advice.
You can do better by reading the law and tax treaties yourself, then getting someone to verify your interpretation.
Law is just code for humans.
A lot of things you can pay a lawyer for business/tax/etc wise, your accountant can probably do better and cheaper.
Accountants are under-appreciated. lol.