Decor Budget: Am I being unrealistic or is it possible to have decor for under 4k?

We're not having an actual wedding. We live in the South and all of our family and friends live outside of the US. We're eloping in Colorado just the 2 of us and then traveling to our home country to have a post-elopement party with our closest friends and family at a bar that we love (total of 80 people).

Since we're not having an actual wedding, we thought a budget of 15k-18k was reasonable. It's now pushing to 20k-25k. We're not getting/accepting financial help from anyone, we're paying for everything out of pocket. We try to be financially responsible and honestly, just knowing we're spending this amount of money when it can be used differently/invested is a huge sacrifice for us but we're willing to do it for this special moment.

We're just so in shock about how expensive everything is (I got several quotes for 3 hours of elopement photography ranging from 5k-8k. We thankfully managed to find someone for 2.5k). Anyways, we almost have everything ready EXCEPT for decor and I'm freaking out. Our event is in 2 months and apparently, 4k for decor is simply not possible.

For context, we're having this party at a bar with a vintage look that I absolutely love. The place itself doesn't need any decoration at all. However, the bar only has a few chairs and stools, so we need tables and chairs for people to sit and eat, and of course these tables need to have at least tablecloths and some decor items. We have a planner and together, we have reached out to several decor vendors and we just get ghosted. Initially, my fiance said his budget for this was 2k. I told him that based on all the quotes we have received for everything else, that's too low so we agreed on 3k-4k. One of the vendors we contacted, said he was available on our date and asked for more details. We gave him the details and our budget and he ghosted us. Another person we reached out to never replied and there was another one that my planner said not to bother reaching out because she has worked with this vendor before and she works luxury weddings only. Another vendor quoted us almost 7k. I just think this is crazy for something so simple (or maybe is not as simple as I thought idk). We want two long tables to sit 40 people in each one and some minimalist flowers or something for the center so the table doesn't look empty (we're not getting any glassware or charger plates). Is 4k or less unreasonable for this?

EDIT TO ADD: We live in Texas, eloping in Colorado (just the two of us) and the post-elopement party is taking place in Puerto Rico where we're from (all of our family and friends are also there).