I decided to model the back side of an old furniture mill and this structure was inspired by one which actually existed on the branchline I model too...thus it adds credibilty and realism as a bonus.
First photo shows the basic foundation being fitted in place and it shows how I'm able to make it fit my exact needs which a kit is unlikely to do with such an odd spot. Also note this is all scrap wood being used. What some might discard in fact.

This next photo shows the structure nearing completion on my workbench...it is 4 feet long and about 14 inches tall at it's highest point. Designed to gently fit that long wedge shape I was dealing with...it grows wider and gets taller as would often be the case over the years as a business expands or renovation are made to accomidate their manufacturing needs.

This next photo shows the nearly completed "fatflat" being test fitted in it's intended location along the back of the engine service facility.

This last photo is taken from another angle and gives an idea of how the structure blends in and completes the scene...total cost was low ($30) and was mostly about window/door castings and since this was the backside of this furniture mill the windows could be spaced out more as would be appropriate to trackside verses the customer view out front. I think I took a month of evenings on it overall, and time is not that important to me since it is a hobby.

I don't say this is for everyone but it is a very enjoyable activity which suits my needs for a realistic railroad that doesn't look like anyone elses, and costs me small money which in this economy is important.
Bob