I recently had weber rendering done. It was pump sprayed and hand scraped and completed in - day for around 25sqm .
I reckon I paid around £80 a sqm but quite a few windows to navigate and I wanted Apu beads around windows (these are worth it!)
Biggest thing to consider is their talent. It’s tough to get it right so ask to see their work. I paid more than other quotes but the finish is brilliant. And so much cheaper than paying twice.