Sphider for vertical search angine

Question

I'm investigating different tools for building a vertical search engine. I've come across http://www.sphider.eu/ and I think it works fine.

However, I'm not sure how many pages it can index. There seems to be no information about this in the documentatation. I think I will index around hundred sites for this particular search engine and I will have to reindex them at least once a day.

Can Sphider manage this? Or should I look for other solutions?