@Will F.
If you sourced all the materials yourself, you could build a house cheaper, similarly, I wouldn't argue that it's not possible to get a site for cheaper, but you would need to count your hours spent sourcing material into the final cost. If you're chipping away at the final cost by spending your own time doing it, you need to compare what your hour is worth, versus the cost of the provider per hour.
For a $15k website, blended rate of $150/hour, you're looking at 100 hours of work. This includes meetings/discussions, client changing their mind, unique content, ssl certificates, hosting compatibility, CSS, Javascript, Html, all customizations, tracking... here's a pretty good list of website scope:
https://www.ecreations.net/frequently-asked-questi...
100 hours is just north of two weeks of a full-time employee at the blended rate of $150/hour.
I'd would rather you enter the market expecting $15k and beat down someone to $12k, then find someone offering a $2K website, and walk you up to $7K, and you end up with a net negative, a website that doesn't function, and you're pumping money into it to keep it afloat. Just seen it too many times. If someone is good, with happy customers, no online complaints, they're going to charge $150/hour. If they are charging $25-$50 - you have to ask yourself why are they charging so low if others can charge $150/hour?
It is SO easy to read a few blog posts and sound like a web genius, and I see it all the time. And if I didn't know any better, I'd fall for it. So, just trying to help everyone avoid pain. We get a lot of clients coming to us, literally got one today that said 'this will be my 5th marketing company to work with, please tell me how you are different' - lots of BS out there.
I hope that answers your question. My best advice would be to ask the web designer what other investor sites they've built, then ask the client (don't just assume that because they tell you they built a website that they ACTUALLY built it, verify it). If you talk with 3 investors they worked with, and a year has gone by without any major website overhauls required, they're a safe bet.