I’ve got one of these - FE Active Folding Camping Cot - Lightweight, Compact, Portable Outdoor Bed Comfortable Sleeping Cots for Adults & Kids. Fits Single Air Mattress Pad. Camping, Travel, RV | Designed in California, USA https://amzn.eu/d/4JVXoAA
and while not super cheap it is very light (2kg) folds up really small, super sturdy (I’m 95kgs) and is really comfy. Top with a SIM and you’re good to go