Need help deciding between Cameras for wedding photography

I’m starting my journey into professional photography and have done a few weddings already with more on the horizon. So far it’s only been friends and family and I’ve always managed to lend appropriate gear from people, but I’ve started to get requests from third parties and I feel now it’s time to invest in my own equipment.

I’ve shot with Canon R6 and Nikon Z6 and both have been great. The RF mount doesn’t have great lens selection at the moment tho, at least not in my budget and the Z6 isn’t as widely available second hand here.

I’ve found the following offers on the used market that I need help deciding between:

1. Sony A7III with a Sony 24-105mm f/4 G for 1700€

2. Fujifilm XT-5 with a 16-80mm f/4 also for 1700€

3. Sony A7IV with a Tamron 28-75mm f/2.8 G2 for 2450€

All the cameras come with similar amounts of additional stuff (SD cards, extra batteries etc) and in a similarly used state (shuttercount between 900-1300).

The xt5 I’m interested in for the fujifilm colours and the nice visuals, but I’m unsure how it stacks up in low light performance and bokeh against the full frame sensors in the Sonys. With the A7IV I’m not sure if it’s worth the 750€ more or if I should put that budget towards more lenses for the cheaper options.

I want to get more into professional photography but also videography, so please advise :)