Man... So many are so far behind on what is out there now. No need to build or or write your own at all. There are tons of open source free turnkey complete boxed website scripts out there ready to just drop in and add a database for storage. Some that don’t even need a database if you are not going to need much capacity.
What are you looking for? Just a blog to show your wares with contact?, Appointment software + pages? Medical records and appointments? Forums? File sharing site? Store? Social media platform clones like Twitter and Facebook? There are turnkey boxed scripts for about everything.
And of course because they are open source and not encrypted you can tweek them any way you like to customize them after they are installed. I have played with about 200 of these and there are some very good boxed up websites out there. And if you have a static IP address you can run them on a Linux computer from your home.
Bkmk