You'll prob have to pay about 60 more per night.
St. Pete Beach, Sarasota, Clearwater area like maybe Indian Rocks?
VRBO, Sanibel, Captiva, try also Gasparilla Island, if you would like to do the Naples/Marco Island area and can't find anything try the Lely Resort area (it's warm, nice pools, golf, close drive to Everglades/10,000Islands/Marco/Naples/Bonita Springs
Bonta Springs area the Hyatt at Coconut Point is full but the Hyatt Place nearby has avail.
Manasota Key? No pool but quiet location near the beach
https://www.vrbo.com/3945661ha and you don't want canal front with a toddler anyway