Standard 10 Firm Hybrid Mattress with Cooling Cover

I suggest spending some time on: https://www.reddit.com/r/Mattress/ now that said, I had an extreme budget for a guest room mattress that I've slept on 30+ times (and am also a side sleeper), and have been very happy with a (full size)"Brooklyn Bedding Standard 10" full firm hybrid" which was, and still is, under $200 on a website I am not allowed to link to, but will probably be the first result if you search for exactly what I wrote.

Brooklyn Bedding has good reviews. (we fortunately have a standard queen, and got a Sam’s Club deal) the Rvmiles YT Channel has 30% off codes. You’ve got to scroll to the bottom of the Brooklyn site and click on RV Mattress link. I’m not affiliated with either, it’s just information.

Brooklyn Bedding. I’ve had mine for a year with no regrets. I bought the firm with a cooling top. I was leaning towards the medium but based on other reviews I chose the firm. Fortunately it is not a hard, it does have good support and bounce. I sleep on my side and back and any hip or back pain I had disappeared. Im 5’10, 170. I rotate it every month or two.

Brooklyn Bedding Standard hybrid in Medium Firm from Walmart. Had it since early May and I love it.

Brooklyn bedding hybrid, I'm now a big fan of hybrid foam/spring mattresses for support and longevity (our previous memory foam mattress from Ikea now definitely has a person shaped hollow in it)