Hi
I have reviewed the project description, attached document and have understood your requirements.
Basically the number of reservations is not allowing 1, which is needed to be fixed. Secondly under each reservation more than one tickets/attendees should be allowed.
The first task is perfectly fine but for the second task we would need to check the code of the plugin to know the reason, why it's not allowing for more tickets. We can certainly change this functionality but in case, after increasing this number if it disturbs the functionality of the other parts, we might need additional time/price. This solely depends upon the core logic which the plugin has built. Though considering the screenshot provided in the attachment, this is unlikely to happen.
The ability to set minimum number of attendees is perfectly fine.
Please open PMB to discuss this further.
Kind Regards
Sam
OweBest