Might have as much as $1600, but the more saved the better. Also need a lens.
Sony A7r - $434 (well used condition) Sony A7r II - $949 (like new condition) Sony A7r III - $1299 (excellent condition)
Looking at mpb.com. Are the features and improvements worth it for each iteration?
I enjoy urban/street night photography, urban decay, landscapes, and want to get in to portraiture.
EDIT: I have also, and would still, consider a Panasonic LUMIX S5, or a Fujifilm X-T5.
I can’t/don’t know the technicalities but I know that a camera body you buy once and update it after 5 or more years so because of that I would go for the A7r III. I’d say youtube videos can help you to understand the differences between those models.