Unless you mean the arbitrage of doing this from different countries with more favourable tax/COL?
If you’re wondering how to be a consultant, you won’t get FAANG money. If you know how to be a consultant, it’s a matter of finding the right clientele and/or hiring a sales rep for their clientele.
Two solutions I have seen (thanks to the news):
1. Be being a world-class academic on a hot ML topic consulting to a huge tech company at a strategic level
2. Be the prime minister of a G8 country and consult for global investment firms
If you're a software engineer or even engineering leader at a startup/SME you're not going to find these contracts unless you're in the 0.001% of the market for a niche skill that's desperately in need.
You tend to need some really awesome work experience to get the former while the latter is fairly easy to walk into.