Virtual Machine - LF Geo & Edge

Are there any users out there set up on a virtual machine? I am looking to speed up estimations in Edge and max out the processing capabilities available in something like MS Azure or Amazon WS.
Can anyone help me with the following:
 - Is 32 GB the max system memory Geo/Edge can use? 
- How much faster can Edge run by upgrading the processor (ie from i7-4700 to an Intel Xeon)
- Is there a way to reduce the precision of the 'float' variables?