Church upgrade

Hello all. Our church is looking at doing a whole video upgrade for our livestream. We are trying to keep things under 25k if possible. Our original plan was to replace our 3 Sony AX53's with the Studio 4k Pro G2's but I recently was told that those cameras may not be right for us because they "don't work well in low light", so the music set may not work out well. But then I was told by our reseller that the G2 fixed the low light issues. Is this true? And if not, does that mean I need to shift to the Ursa? Our current setup is 65' from camera to the Pastor.

Thanks in advance for all the help