I think that's not a bad price really for the lack of hassle. You get what you pay for.
We did the opposite. Took 12 weeks to plan. Hired a lovely local village hall (beams and fairy lights) with grounds for £150, did the reg office quietly then a massive party. The street food van (not a chip van, much more upmarket) was about £2k for 90 ish heads. Pulled pork, halloumi burgers, various fries, dips and coleslaw. We bought wine, beer, cider, Prosecco and mixers and provided a free bar - with a note to say bring spirits if you have a fancy drink in mind, and did a dessert / salad / cheese / nibbles table. Sweets for the kids. Candles, fairy lights and jam jars on the tables. Hired an amp and did a Spotify playlist. Homemade fudge favours, paper lace over everything ugly.
Ended up about 100 people. I had oodles of booze left, no one was hungry, everyone ate, danced and had a fab time. Around £5k for absolutely everything, incl cake, flowers, outfits and everything.