Thankyou for your active discussion, it has been most helpful.
1. The Client does have AutoCAD LT at the moment but is more comfotable with Excel. I realise LT can't do lsp straight out of the box but there is a product called 'Cadsta max' which may work. If it doesn't...we're stuffed before we start.
2. This product does need to scale. The box represents a shed, the shed will have a pitched roof, and we will have to add a number of windows and doors into each side of the shed. So i think it would be a little too much for .scr.
3. I am a consultant of sorts and have a couple of mill in insurance. At the moment i want to advise on the feasibility of developing the product, whether i could do it or get a third party to do it and either way whether it is worth doing from an economic point of view.
4. I estimate i would have about 140 hours in the budget (my time) to develop such a product. Therefore, if there were some code i could, in the words of TT 'Hack', and adapt into a working model that the client and myself could develop over time, it may be feasible. Otherwise i'm getting the impression it may be a bridge too far and learning to code would have to be something i do in my 'Spare time', not that i have much of that.
I do very much appreciate the discussion though it will probably have saved me getting into something that would take a lot longer than expected to finish, unless i have read it wrong?