Hi Howard,
that you have found a foundry is good news, it may or may not prove to be the best option.
The column of your machine is a more complex molding operation than it could or even should be.
The base is fine.
Look closely at the base, all the '3D shape' is on the upper side whereas the bottom is flat. This means that the cope (might be the drag, I can never remember which is which) can be molded on top of a flat board.
Very simple.
Look now at the column, you have 3D features on both sides, so you will need a split pattern, or a splitter board.
The costs of casting are molding, pouring and fettling. The cost of pouring and fettling are very much a reflection of the size of the casting. Molding on the other hand depends on the complexity of the part.
With some judicious re-design you could make the molding process much simpler and therefore cheaper.
Even a well thought out design that allows the use of a simple drag and cope greensand mold is still going to be expensive, the question is more 'is this option more price/performance
competitive than other alternatives?'
Craig