Hi, as far as I understood you only want the objects put in Unity, if it is just for visualization than it can be done quite quickly, but if it is more for interaction it could take a little longer as I need to check really which objects are worthly to collide because the more object that can collide the slower everything in the scene will behave.
Anyway, any of the cases you want it should't take more than the 4 days I propoused as it doesn't seem you are asking for complex behaviour, physics, and all that stuff.
Also I would like to know in which format would you send the files, I'm assuming in .max, but you can tell me if for any reason you are planning on sending them in other format.
If it is really urgent and you need it sooner just let me know and we can discuss about it.
Just let me know if you like my offer and we can discuss more about it.