After replacing broken components, optimizing the hard- and software configuration and a thorough check-up of all systems I finally am able to do HQ-renderings again and continue with all projects. As mentioned before no data were lost, so I can directly continue where I left off.
My primary focus will be on the ongoing commission. However in order not to overwork myself I will not push too hard to make up for the delay. All given ETAs therefore will be postponed for approximately 2 weeks.