I would agree with that price.
Break it down, on average daily rates .for example.........
Some clients get charged more, some get charged less.
Even if you are given the model.
Modeling from scratch 2 days............€500
Textures and lighting 1 day.............€250
Rendering and PP 1 day.............€250
Comments and finished items issued....1 day ............€250
----------------------------------------------------------------------
Total 5 days ......... €1,250
Add overheads eg software subscriptions , max corona, ps all add up ...........a % of the over all costs.
and your living expenses............another percentage.
So can I say , as mentioned before.....ask for as much as you think you can get, your not being greedy, you work is good enough, and from the images posted, there is not way the Revit or archicad models give the correct individual items like the american style fridge, and presses.
You have worked hard and long to get were you are, now charge for it , it's your career, be proud of it and make sure they know your proud of what you do.