Hello pixelneco
Thank you very much for you input and advice. 
Yep, I love the Joomla and Seblod combination too much to leave. I left 
just for that one project for which I was desperately in need of 
multisites feature. I couldn't get Seblod multisites to work. But I 
don't think I will ever be able to leave Seblod/Joomla completely for 
another. Seblod offers endless possibilities and I really commend the 
Seblod team for their time, effort and skills. For presenting us with 
such a great product, for free. Yes it is frustrating at times, very 
frustrating. But like you said, it gives us so much more. 
I've 
played around with Typo3 and two others and immediately realised that 
they don't compare. Yes, they maybe easier to use in certain respects, 
and if you are a regular user, but their features are too limited. I've 
managed to get an extension date on my project, so I have time to sort 
my multisites issues with Seblod. I actually don't think it is 
impossible. I just think my lack of Seblod Multisites knowledge is 
what's getting me. I've been working with Seblod for quite some time 
(maybe a year) and I have since been doing every site with Seblod. I 
have setup talent search/modelling site, news, my webhosting site and 
others using only Joomla and Seblod. I've also cut down on installing 
extensions.Where possible, I use external scripts for things like tabs, 
accordians, image/content sliders, etc. Always concerned about speed....
 Maybe two or three Joomla modules and plugins. 
I have never 
really looked at Seblod's multisites feature very deeply, as I never 
needed it. I did ask a question once, whether it slows down websites 
(lots of users, content, traffic, etc.). That time the project was just 
discussions and nobody really knew the ifs and whens. Now its a reality.
After
 being in the wilderness for about 3 days (that is a very long time to 
be lost and away from my beloved Joomla + Seblod!) and after lots of 
meditations, confessions,  and inner soul searching, I am back. They 
tried to baptise me in the name of Typo3, Processwire and Drupal; They 
tried to convert me, tempt me, and bribe me; they sprinkled unholy water
 on me and spoke in unearthly tongues. They even tortured me. But they 
couldn't sway me. My faith is what got me through. My faith in the cms 
trinity. In the name of the Joomla, and of the Seblod and of the Awesome
 Power! Amen!