What i would do is include tips and boost payments in the overall invoice. No need to split that part or have a separate nominal since its all taxable under income.
With regards to them paying in bulk,
Continue as I suggested first, but hold off on the money transfer tag until the balance matches what they pay.
So add invoices from Monday to Sunday, Create transactions for the fees then transfer the whole remaining balance across once the balance your left with matches what they have paid you.
So if your invoices for the week came to £200 and they took £50 in fees then paid you £150 on Sunday you would
Cr each gross invoice for monday to Sunday tag them to your invoices.
Ďr fees (can be separate or total for week tour choice)
Ďr balance transfer (making sure to note that the balance matches the payment received)