Maybe just apply for the simplest visa then before it expires you can upgrade to the visa you want once your here..it would be alot easier then trying to jump thru hoops..
You can use an agent here to expedite your new visa it will be well worth the money you pay the agent
Why wouldn't you do your work on Germany's time so if its 4 or 5 hrs difference so 9am in Germany would be1pm here can't you work on that time frame..or what ever the time difference is?
Not sure if this still applies but at one time a little while back the banks and insurance companies made you buy a one year ins policy (5000bht) when you opened a new account not sure if it still applies?
So 5 yrs ago I purchased a multi entry visa in Canada for approximately $260.00 cdn..I used it once..that's approximately 6,500bht you can purchase an re-entry each time for 1000bht..