In answer to your questions;
1.1 It is not possible to prolong the TimeBomb environment. One possible workaround would be to backup the configuration data and then restore it with a new installation with the same version.
1.2 The local storage cannot be increased.
2.1 Using their grant number a customer can download the ovf and associated files. There is no ISO available
2.2 The VM is thick partitioned so there are hard allocations for space and that cannot be changed.
3.1 That should be possible if they are on the same version. However, to my knowledge that has not been QA'd. If it is something that would need let me know and I can check further with QA.