Any reliable websites that list lower cost rentals in Yucatan?

Am looking for something between Playa del Carmen and Tulum,  Wondering what a 2 bedroom within 10 minute walk from the beach in a safe neighborhood would run.  I know prices have been going up and I am on a limited budget.  Also, anyone know if prices listed on Numbeo are somewhat accurate?

Thank you
Rob

PS, I'm not moving for a few years.  Just looking to see if this is a viable option given my budget.  I wont start collecting my pension and SSI for another 13 years, so I need to keep it under about $1200 a month total until then.

very pricey areas, vivanuncious is good for local rentals. However that area is among the most expensive in Mexico