Best Practices Accounting Hub integration with our investment subsidiary company based on portfolio

Hi All,

We have requirements for Accounting Hub integration with our investment subsidiary company based on portfolio. And the finally JV Lines that end user makes now for each Portfolio (One Journal for each Portfolio at Monthly basis) is as following

Now, my inquires

1- Should we create one event type that has all the above 13 Lines as Journal Line under the same Event type (Journal Rule Set), Or One Event for each line of them and the other side will be clearing Account? what are Pros & Cons for each one of them?

2- When we are going to upload the Transactions using the sheet, can we upload