There are some rare newbie developers who can make 1000 renders in 2 months tho, but it seems you don't want to work that much.
So yeah, you are doing a good job in ntr category but you are overcharging for pretty short updates.
1000 in 2 months is realistic, but there are a few ifs and buts.
First one that comes up is the rig and the scenes.
500 Renders per months means 125 a week and if we put it to standard 5/2 workweek it means 25 renders a day. If we take standard 10 hour work day that means 2-3 renders per hour.
Now ifs come up. First of all, what kind of GPU you have. Sorry, but if you don't own something with more than 8 Gb - have fun with tweaking shit trying to fit 3+ chars into the scene. And if you have something with a lot of poly and 8k(like, popular college outfits - can be seen in games like BADIK) it makes shit even harder.
If you have 3090, for example - that changes things and stuff that would take 30 mins takes 5.
For developer who's making a first game - that's a stretch. Or it was that a couple of years ago when GPUs prices were through the roof(thanks, fucking miners)
Also, what kind of story there is also plays a point. If you have a bunch of wide shots in school cafeteria - woooah, enjoy having your 1 render being baked for 20 hours by your CPU instead of GPU cause there are 13 people in there and there's not enough VRAM.
And don't even get me started with animations)
Now, adding to that, if you're really trying: polisihing and doing postwork in PS takes time. Writing takes time.
Coding takes time(CH is not on par with top-notch VNs in this case though - linear story without any screens which sum up this and that for you and no mini-games)
Overall, 500 renders per month is a number which you can demand if the project is earning 1-1,5k+ or if there are multiple people with few machines working on it.
But if it's solo - anything between 150-400 is good.
This project isn't something breaking or shitty. It'll capture it's niche and may end up getting 2k per month at it's peak. Then we can start making demands and accuse peeps of milking.
On the other hand, several peeps in here remind me of notorious "Dual Family" thread circa 2018-19, where there were 1-2 fanatics(still remember Joshua Tree) who defend anything related to the game like it's Holy Grail)