I'd like to ask you some questions to help me choose a hybrid camera for amateur use - family and travel. After reading many reviews and opinions I'm considering two options:
1. Sony A7 III + 28-70mm f/3.5-5.6 OSS (alternative: FE 50mm f1.8) / 1250-1300 EUR (used), or
2. Fuji XT3 + 18-55mm f/2.8-4 R LM OIS (any OIS budget alternatives?) / 1000-1050 EUR (used).
I would also like to use my Contax Zeiss 50mm f1.4 with an adapter.
Please help me decide which one to choose, considering these factors:
IQ in video: 4k 24fps / 1080p 120 fps (slow-mo is less important);
stabilization in video: Sony's IBIS + lens OSS (or only IBIS with FE 50mm f/1.8) vs Fuji's OIS in the lens - mostly standing and walking slowly;
AF in video: keeping in focus a 3-year-old kid.
Regarding photos - I shoot RAW+JPG and know that Sony is better for processing low-light RAWs but Fuji has better JPGs SOOC.
I am considering cheaper options as well:
Fuji XT30 or XT2, and
Canon 5dmark II (poor DR in photos though), 6d, or mark III with ML (I know that I would have to rely on MF in video). There are also some good deals on used 5d Mark IV (850-1050 EUR). I don't know if mark IV's 4k video can compete with ML though. What's important: by choosing Canon I could cut down the cost by using the existing Canon 50mm f1.8 (if it's any good for video). Within 1000 EUR price range there is also Canon RP but the massive crop and lack of DPAF in 4k, as well as no IBIS and poor DR, make it look very bad for a modern camera. I exclude Sony 6xxx series cameras because I don't like the ergonomics and heard that they are prone to overheating.
I don't have a budget for any additional lenses or gimbal (don't know if I'd like to use one) but a cheap/used monopod could be an option for a non-IBIS camera.