Camera recommendations for low light wildlife setup

[Wombatgirl]

Hi need input on how cameras and lens photograph in low light. I usually shoot right on sunset of kangaroos and wombats as I run a little tour buisness. I don’t mind buying second hand also if that will get me into the quality required. This is what I’m thinking,  many recommendations welcome.  I’m currently using a lumix fz1000ii and shoot regularly around the 700-800mm range. The photo was taken 10mins after sunset at iso 750mm, iso 1600, f4 1/125. 

 

just as an example images are good considering but looking to upgrade. 

R7 with RF 100-500

R8 with RF 200-800 of with tele converter 1.4 and the rf 100-500.  There is no ibis but does that matter if shoot near full tele

[Tintype_18]

No matter what you get, download the manual on your computer. Easier to read than a smartphone. Study the basics. Nice thing about digital, you can shoot a bunch of photos on different settings and download on the computer to learn. I have done this for about six years.