Buy a Manufactured House - Yay or Nay?

Ok, so our price range is 40k to 75k when looking to buy a rental property, C class.  Assuming the location is decent, what do you think about manufactured houses?  I struggle with getting serious about them because our strategy is buy and hold for the long term.  And generally, these are not long term houses since I feel they are not made as tough.  Buy maybe they are??? However, there are a lot more manufactured houses options in our price range, then constructed house options.  Plus, I am not sure a manufactured house has "renter tough materials."  But maybe I am wrong.  What do you guys think.  Yay or nay?