Offer from Heizungonline Viessmann Vitodens 200 with Vitocell 100 storage 160l complete approx. 9000.
It was requested via the tool at Viessmann. The question is what else will be added?
Why do you keep asking here in the forum?
Just call several companies in your area, describe your problem, and ask them to make an offer. Then (hopefully) someone will come by and take a look at the conditions at your place.
An online tool won’t do. The 9000 EUR fits for a standard installation, but what else will be added can only be said by someone who has looked at the system at your home.