I have been in WordPress more than 2 years, by considering time it's not big but I gathered a lot of experience. Just a tiny error can crash your website like 500 error. Many webmasters faces 500 error for plugins setup (e.g W3 Total Cache). If you don't know how to fix then it's always big deal. I will help you to fix these type of error as soon as you hire me and get rid of from your website problem.
Keep your trust to me, I never eat your money until I solve your issue.