I second the IKEA mattress and bed support. The slated bed bases are also great for shitlording. Ive told guests that I have the wooden bed bases and if they break them, they will have to pay to replace them and pick them up within 24 hours. 3 ham relatives have slept on the uncomfortable couch in my home because they didn't think their weight would be supported. It's a great way to keep fat asses off of my bed.  I also like to splurge on bedding and having a "cheap" IKEA bed and mattress allow me to get really nice sheets and pillows and not go over budget.