Another tip is to not overthink it. We let each vendor handle their own deal. For example, my wife didn't tell the florist how to decorate. She said 'you are an expert with flowers, I want pretty flowers, make it look nice'. Along with this, I would choose pretty venues that are easily available or public. We had the reception on federal land, which means that the prices are somewhat regulated already. We also got married in one of the beautiful Catholic churches in the city, which needed no decoration whatsoever and was totally free (although, obviously, you have to be part of the community there).
Finally, do not waste money on a fancy photographer (probably my most controversial opinion). Photographers are expensive, and there's only one part that's super important to photograph (the ceremony). We could not afford a top-tier photographer for the entire thing. We instead hired a good photographer only for the ceremony. For the reception, I went on craigslist and hired a photography student. She wasn't as polished as the professional, but she gave us 1000+ photos which we later sorted through ourselves. Not only was this fun, but it was a lot cheaper. The professional photographer would have charged 3-4k for the entire night. Instead we spent $200 for the ceremony and $600 for the reception.
Then one should go the extra mile on purpose to make them feel disrespected.
Last I knew this was a solo dev doing great work.
theknot - hustle free website and many other tools
zola - if you need online registry
minted - physical cards, they’re also integrated with the know so you can have some website templates in style with the cards.
paperless - decently cool emails instead of physical cards.
Congrats, and enjoy the process!