@huber70
1) monitor: That's a nice price! At this moment € 20 - € 25 more expensive.
2) I bought my Pi4 - 4 GB with power supply, plastic case, small annoing fan (can be automatically switched on and off) and mini-HDMI cable for just under € 100 (before the chip shortages).
3) When you are really into photography I think a drone with a good camera can add value! I really like the picture