I import and have long waiting times. I upload the stock to the system via the import function, and import it as an order. You can still allocate a payment to the supplier. When the stock arrives I convert to Bill.
I account for the freight + tax with separate bill, once again uploaded via import. You apply the freight + tax amount to the product. But you have separate line item that minuses the inventory, with a zero value. So there is no inventory qty affected, just the value.
If I have any variances eg short supply, I will create another bill and do the adjustments with that.
Been using this method for years and it has been rock solid.
For reporting I use my.bi4cloud.com - it is browser based and way more flexible than MYOB reporting eg you aren't restricted with date ranges like you are on some MYOB reports. It is only $44/month but just so much easier to interface with excel.