Rochr,
I used to use something I believe it was called Dreamhouse by IMSI . It would take about an hour to render a room but the results weren't anywhere near as impressive as Maxwell. It was probably cheaper by a factor of ten though.. You could add building materials costs and have the write out a log file of expenses, materials sources etc.I believe you could add your 3ds furnature objects too..  The program has matured since I used it - you might check it out for architectural stuff that isn't going to end up as artwork.   

Rayraz,
Nah I'd end up spending all my time in court and in most cases a judge would kick a suit like that out of court. If I did win then I'd get a big head and try to get qualified to pass the bar - No one wants that!!!!.

There's a lot of those clowns out there. I finally found a decent free firewall which blocks these jokers out and lets me know about it. I guess that and being knowing how to complain to the abuse sites will have to do.