Rain Barrel: Installer for rainwater catchment system?

Seeking experienced installer for a large rain barrel/rainwater catchment system. 

We'd like to install a large rain barrel, connected to gutters. Not looking for anything fancy or underground. But barrel has to be big to be useful. (We already have laundry-to-garden greywater system. Not interested in DYI because those barrels are too small to make much of a difference in keeping our fruit trees alive through a long hot summer.) 

Please share any recommendations for an installer who can do this for a reasonable price. Last time I priced this out, I was shocked by the prices they were charging for labor. Thanks.