Hi Karel,
Do you still keep your previous QTH with all the great antennas you had or you got rid of everything?
Should you still keep them, have you considered setting up a remote station?
I went through a similar change when we moved from the QTH in the village, where I had a good radio station, to a rental appartment in the city center. I initially installed an endfed wire in the balcony, but one day the QRM became unbearable and I setup a remote station with an Icom-706. I initially had it with one single antenna and later I included a remote antenna switch letting me select up to 4 different antennas I have in my rural QTH. Later I also included an automatic antenna tunner, which I can command from the IC-706 front panel. This is how it looks like in these days:
This is what I have with me at the rental appartment:
This is what I have at the QTH in the village:
This is me chasing a Northamerican activator on 20m CW a few weeks ago:
Cheers,
Guru