Lesco/JDL sells a 50lb spreader that is very "commercial". It is just a smaller version of their standard 80lb model. The only thing I don't like about it is the same thing I don't like about some other equipment that is used with fertilizer. The handlebar assembly is powder coat paint instead of stainless. In time, it WILL rust.
Other than that, it is a very sturdy spreader and could come in real handy on smaller lawns.
"The Poor Fish" circa 1930's: The Poor Fish wouldn't have been caught if he'd known enough to keep his fool mouth shut.
"Opportunity is missed by most because it is dressed in overalls and looks like work"- Thomas Edison, businessman/inventor