Hi, Matthias 

Firstly, I would like to sincerely apologize for the delayed response as we have been experiencing an unusually high number of tickets. I am sorry that it has taken longer than usual to respond to your concern and your patience is highly appreciated.

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Happy to hear that you like our plugin, thank you.

I am not sure if i understood how you set this up.

Currently, Amelia doesn't have the multi-vendor option. There is a possibility that it will be available in the future with the developer license, but we can't say an ETA on it.

- At this moment, the only workarounds can be:

 if you purchase the plugin now with the developer license you can have unlimited separate domains/sites for different vendors, or you can make a multi-site environment where each sub-site is for another vendor. 

So, usually, if we need multiple "vendors",  or multi-site environment;

we would make several sites, and each has a completely separate Amelia installation on their own WordPress.

But seems to me that you put this somehow in one booking form, to see all 3 sites? 

If you can please elaborate a bit more on the details how this is set up.

If you can perhaps record a video of how this looks, or some screenshots?

Thank you