Greenville/Greenville area "open house". (houses, relocating)

[FrozenAngel]

I am planning to visit Greenville the end of this month for a long weekend. I do not want to waste a realtor's time because I am in the very beginning stages of relocating but I would like to see the inside of these houses and what you get for your money. Where is the best place to find listing of the area's open houses? What day do they usually hold them? Are the Chambers and libraries open on Saturdays?

Any ideas of how I should spend my limited time checking out the area would be appreciated.