The core path for non-US residents registering a US LLC is: choose state → RA → Articles of Organization → EIN → bank account. DIY costs only $150-500 but takes 6-13 weeks, with the biggest bottlenecks being EIN application (Fax non-response is the norm) and bank account opening (unstable policies). If your time is worth more than money, consider an agent service ($500-1,500) to compress the timeline to 2-4 weeks — but remember, even agents cannot eliminate the uncertainty of EIN and bank approval.