Balustrade designing/ CAD-like software

We are looking for a software we can use to design balustrades. Currently we are using a draftsman to individually create designs based on a project by project basis on Autocad. We are looking for you to create a software which allows us to input the dimensions and based off a series of guidelines and minimum requirements which will then automatically create generate the drawings. We are also looking for this software at the click of a button change between the different designs we currently supply. Please see our website " [login to view URL] ". For example: - We input measurements of a stair with a wire balustrade such as item "BSWC-1". This software should be able to automatically generate a drawing and will create a materials calculation. at the click of a button we'd like it to be able to change to a glass balustrade such as item "BSGC-1". Please see "[login to view URL]" for a general idea of what we'd like. Take notice how designs can be changed with clicks of a mouse. We'd like for it to be similar to this software with the added functionality of being able to add further designs as required between varying ranges. I(Removed by Freelancer.com Admin) We are based in Sydney Australia. The budget is negotiable if required. Thanks