Hi, I have 2 questions,

I want to print a model, got a offer on 2500 dollars: S
It's way too expensive to try my idea, think the problem is that i whnt it relatively large, around 500-600mm long and 400-500mm wide.
Do you have any suggestions on how to solve it to make it cheaper?

Then I have macbook, and try to find a program that i can change a bit in .STL files, but have not found anything, or those I've found have cost a lot of money, everything about online, for example, changing measurements etc?

thanks in advance