Construction costs are currently skyrocketing

Unfortunately, I have already factored that in (or out).
There are plug-in instantaneous water heaters with 3kw, which are enough for the hand washbasin and probably also a shower. Of course, you don’t take a hot full bath with that.

Temporarily, the shower in our motorhome will be better. With gas, we can heat the 10-liter tank to 60 °C. That should be enough for one person.
Do other heat pump manufacturers also have such delivery difficulties? Actually a new topic?

There are plug-in instantaneous water heaters with 3kw, which are enough for the hand washbasin and probably also a shower.

Hand washbasin yes - shower definitely not. That doesn't work with the small devices.

There have been delivery difficulties with heat pumps and also gas boilers for 6-8 months. Sometimes circuit boards or small parts are missing.

There have been delivery difficulties with heat pumps and also gas boilers for 6-8 months.
Sometimes circuit boards or small parts are missing.

So far, I have the feeling that only Vaillant heat pumps are affected? There are several problematic areas here.

So far, I have the feeling that only Vaillant heat pumps? There are several issues here.

I have Bosch / Buderus, they also have problems with availability

That means if no short-term delivery date is named by the end of January, then I'll go ahead with the heat pump deal and buy myself two more instantaneous water heaters for hot water.

There are gas instantaneous water heaters that operate with propane. That makes you flexible and you can shower forever. You can borrow a propane gas bottle for that at any hardware store, and it lasts forever. We had that last summer in our temporary accommodation. If you need it, I still have them lying around ;).