Hi
That is indeed a big pain with solman... the base 'installable' version is an SP04 from 2012 (10 Gb)... and then you need to apply SPS12, that weights 11Gb !
And then you have to explain to your customer why it is twice longer to install a solution manager compared to an ECC...
This might be solved when solman 7.2 will be available... and pray the first version will be bug free
Regards