I currently own an octane license with a quadro FX 4800 1,5 gb.

On my experience I have trouble on half scenes I make. Texture size is easily managed with resizing all of them (50% make the job) after collecting all them, as the octane look for textures in the same folder as the geometry. It's quick!.

For textures number it's more complex. For exemple: V4, Marai from Surreality, UraalNys clothes from Awfulsoul, Midnight summer dream hair, path scene from vikike: 120 textures approx!! The only solution I found was 2 or 3 exports from Poser, geometry object node in octane, 2 or 3 renders and after postwork!