Looking up on fiverr.com for website building gigs,I see that they charge from 70-200$ on average but there is also high price points up to 2000$.But this number will highly depend on how complex the website in question has to be.The more complex,the more time and effort consuming it is,them ore money you'll charge. For example,building a simpe wordpress website isn't comparable to building a whole shopping website like Amazon.

Concerning the market,I guess that these days most digital skills like programming,design etc.. are highly lucrative and the demand is also there.