Line Flow - Generic, Bill Only

Hello ,

Cash Sales 

We were trying to setup for Cash Sales, such that there are minimal steps to be performed to complete the transaction, for this we have tried to used two workflows :

1)  Line Flow - Generic, Bill Only with Inventory Interface

2) Line Flow - Generic, Bill Only 

while using, each of them we had some concerns, Which are :

1) Line Flow - Generic, Bill Only with Inventory Interface

When we are using this workflow if we are Locator controlled subinventory -- It is required to Reserve and Assign the locator manually Before booking the order. Is there any way we can automate this ?