Hi guys, I just collected the key from my new condo today. I'm looking to buy a queen/king size mattress for my bedroom. FYI, I'm renting the unit to the tenant, not for self-use.

I need some recommendations on lower-tier mattress brands and models, as I'm not very familiar with them. My main concern is the price and quality. So, I don't really mind if the mattress is not from a reputable brand as long as it's cheap (won't sleep until back pain that kind). Thanks in advance!

Edit: Is there anyone who knows Airbnb operator usually buys what kind of mattress? Do they use at least hotel-grade standard or just any cheap basic mattress?