What size paper does your printer handle? Are you sure the model will fit within the printer's margins? Are you getting the model window to the correct aspect ratio?
Upgrading to Pro could be a good option. As I described, the process for being able to print things like this to scale is much easier. If you have to do this more than once in a great while and you value your time, the cost of the Pro license isn't really a big deal. You could figure out how much time you've got invested in trying to get this one thing printed and add in the time for someone else to try to help you.