The house does not have gutters because of the tin roof. This will help with the heavy rain runoff.
Copper Collection Rain Chain Bowl
Rain chain DIY
http://www.mobilehomereplacementsupplies.com/rainchainoptions.php has some information on how rain chains are viable alternatives to rain gutters and downspouts.
Square Link™ Rain Chain (Black) $50 free shipping
Take Down your Gutter Downspouts and Replace them with Rain Chains and Barrels – DIY
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1920's Bungalow. Big front porch with a swing, lots of clean lines and woodwork.
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craftsman rain chain - Google Search