I have a client wanting me to install SharePoint Server 2013 Standard on 1 WFE server (Server 2008 R2 Enterprise, 96Gb RAM with 2.5TB HD) and 1 SQL server (SQL Server 2012 Standard). I know best practise is to implement a three-tier architecture but my client only has 100 users. Should I be hesitant to implement this 1 WFE and 1 SQL Server architecture? They also have a cloud based backup process, will this add complication? I'm going to use autospinstaller for the install, do you recommend this?