If you making a new PC and just the concept of installing win 10 again is too hard, I would pay someone to make the entire PC for you just to avoid any mistakes you may make by not knowing any better.
Find a shop that makes PC, not just one that sells them. They more likely to not rip you off. Even better to find one that lets you custom choose the parts in PC and then watch reviews and read articles about each part to know its worth getting. My last three PC have been like that, they last a lot longer if you careful and get right parts. Buying cheap parts just means you replace them faster
Installing win 10 seems hard until you do it a few times and think, hang on.. that is easy, and I was going to pay someone to do that? These days with youtube videos that can show you how to do almost anything and tutorials like this:
http://www.tenforums.com/tutorials/1950-windows-10-clean-install.html there is no excuse to not at least try, and if you mess up installing software, then ask for help. (Notice I said software, making hardware and messing up can be expensive)