Thank you very much to all of you! Great options, great ideas!
I tried some of them and until now the results are promising... but I still have a problem that is nasty actually:
I tried on SU2017 and when pointed to a directory without plugins it loaded only with the toolbars that it had from the built-in tools. But - and now starts to be messy - when I returned it to the folder where all my plugins are, I got a toolbar mess...
I believe a way to save the toolbar positions and restore them would be ideal, not only for my current situation, but also for Backup/Restore. We have the bundles in Extension Store, which saves a lot of time, but still arranging toolbars is left to the user (yes, this depends on resolution, available plugins, etc), but considering the same display resolution and the full set in the bundle, would speed-up the restore process.