All applications worldwide are online. Submit enough documentation to convincingly show you are a viable stable experienced business. I would say length of time is more important than how many contracts.
500k needs to be in a regular personal bank account, not an investment account, or fixed term interest account, or anything else. And depending on the embassy you apply at it typically needs to season for 3 months.
Every place you stay is required to file a TM30 which is reporting you residing at said location, if you leave the country and come back to that location they are required to file the TM30, 99% of the time in most immigration jurisdictions, if you leave the country and return to a new residence a TM30 needs to be filed. A TM30 is required before you can receive any services whatsoever at your local immigration office. Nothing substitutes the filing of the TM30.
Other than saying you applied using the workation scheme, you haven't provided any details, so it's impossible to give you any relevant useful feedback. If you want to lay out in detail where, what, when, how long, how much, exactly what you submitted, did you provide a cover letter, what extra documents were requested if any, then your submission can be analyzed and feedback presented.