Should I hire a web designer who doesn't code themselves, or is that a waste?

A freelancer offered to build a logo and website for $700, way cheaper than the agency's $8000. My mobile massage business uses a separate app for bookings, so the website only needs basic features. 

The designer seems to know SEO, which is great because I'm a beginner there. From experience he advised against building it myself, but I'm wondering if a website builder could be a more affordable option. Should I hire the designer or consider a DIY website builder route?