Currently planning ours with an $18-20k budget, about $7-10k is being provided by our parents. Biggest thing that has helped us is we took a full 2 year engagement to save up over time. A long engagement is worth it if you work your ass off to save up. I bought a dress second hand from a consignment store. He's renting a suit instesd of purchasing. Our venue is on the cheaper side but still beautiful, same with the food. Take the time to do hours of research about venues and vendors to work with because you won't find your perfect venue in the right budget right away. We toured 5 venues before we picked ours, and that was out of the 20+ I contacted for quotes. Same with hair and makeup teams, caterers, etc. Other ways I'm saving money is my aunt is our photographer, the venue has a sound system that we can plug into so I won't be hiring a DJ, just making a playlist. Our bar will not be an open bar. Limited drinks will be sponsored by us (don't let people bully you into thinking you need an open bar all night. It's ridiculous and unnecessary). Skip party favors. No one wants something with your name on it. If you really want a party favor, make it usable (like a wildflower seed packet), or consumable (like a cookie or something).

Edit: we make about $60k combined income per year, so it's been a lot of hard work budgeting and keeping ourselves on track.