Is the building plan reliable? When to terminate the rental apartment?

Our screed was poured last Thursday. :) The handover of the house is supposed to be between 11th and 22nd July 2022. Yesterday we decided to terminate our apartment by 31st August. :) Our plan B is that, if necessary, we will rent a larger storage tent, which we will set up on the property and store our furniture there (which is not very valuable either) ... once the house has been accepted, we only have to "haul" the furniture inside, as they will already be on the property then. :) According to plan B, we would then live in a rented caravan, a holiday apartment, or similar ... maybe we will just camp, after all, it is summer and we have electricity/water at the construction site. However, we are "only" two adults without children, pets, or professional or social obligations, so an unregulated daily routine is temporarily possible.

Have you inquired about the delivery times for the meter cabinet, heating, and possibly controlled residential ventilation?

If I am correct, all of that is already in the technical room. We do not have controlled residential ventilation.
Did you receive any instructions regarding ventilation or similar after the screed installation? We want to ask our construction manager about it. At the moment, "somehow" such a drying device is connected to the underfloor heating. How is it with you?

We have 6 construction dryers that I have to empty 3 times a day. Additionally, the underfloor heating was connected via a heating cartridge. So I am in the house 3 times a day, airing for about 20 minutes and emptying the construction dryers.

Interesting, I really have to ask our site manager again. We only have this one device that is connected to the underfloor heating. We don't have to drain water anywhere. Maybe the "thing" on the underfloor heating is also a cartridge? I have to research that.

Are your walls already plastered or filled? That is supposed to be done for us next week.

The interior plaster is already done. For about 3 weeks now.