It's not very nice to hide Billable Expenses behind the Plus version. It is something basic that pretty much everyone should have access too who is doing any accounting/bookkeeping. There is nothing in the Plus version for another $30/month that I need that I don't already have in Essentials. I would go back to the desktop version if it wasn't for integration issues with another piece of software I use.

The work around that I just came up with for myself is to create a Delayed Expense for the customer.

When you create a new invoice for the customer you can select and add the Delayed Expense to the invoice. The expense does not show up in the balance though on the Customer view list for me at least.