Consulting-based E2 Investor questions

Hi everyone — I’m currently planning an E-2 consulting/service-based business from Ireland and still in the early structuring stage.
I’d love to hear from people who successfully applied with a consulting or remote-first business model.
At what stage did you:
register your LLC,
commit investment funds,
and lease coworking/office space?
Did you already have clients before filing, or mainly a strong business plan and setup?
Trying to understand the practical sequence before making major commitments. Thanks in advance!
And how much realistically extra to investment funds we need to manage 3-6months expenses? Does it take lot of time to settle?
And have you invested 80k and proven successful??