i have searched and make some googling ,
(about render farm - for blender ),
there is 3 popular choices ,
but all are highly expensive .
looking for cheap alternative for rendering exteriors may be 1000 frames
I don’t know what your budget is, but this is the cheapest professional option:
Your best option is probably SheepIt, which is free. The caveat being that you must contribute your machine for rendering before you can use the render farm:
You can go for a free render farm Sheepit but you gotta contribute your computer resources as well.
If that’s something you don’t want to do, go for a render farm service like GarageFarm where you get 33% discount on all Blender rendering and a nice starter credit. Here, I found it for you https://garagefarm.net/blender-render-farm.
I don’t have much experience with render farms, but beginning of the year I was using Polargrid’s free CPU rendering for an animation. I had some issues with their add-on and the transfer to the compute-center (sometimes it wouldn’t update a changed resource), but for free it was fine enough when using it on a hobby project. So depending on your needs, you might also try that one.
Or, you could maybe tryout a render plugin that speeds things up and just render it yourself, maybe on a older second PC with a half OK GPU or CPU.
So something like this: https://3dillusions.gumroad.com/l/turbo_tools
It may cost a little more to start with, plugin plus some hardware, but then it doesn’t really cost any more to keep using. So I guess it depends on how much you need to render and if the results work for you.