I described in a earlier post how to use BW/4HANA on Amazon AWS. But if you just need a developing system for some time and don't want to use BW/4HANA, you can use the BW 7.5 SP2 developer edition on a virtual machine.
There are a good post on the SCN. First you have to download Oracle VirtualBox. After that you have to download openSUSE. If you are a Linux Newbie you can read the following post how to install openSUSE on VirtualBox. The BW 7.5 SP2 developer edition can be found here.
After you have downloaded everything and your openSUSE is running you should read this post to get the installation of the BW done. I needed a BW 7.5 for the new edition of my book, so it was a nice variety for me.
These posts might also be interesting: