Hotels in Pattaya (with air conditioning, private toilet and shower, TV, linen, maid service and maybe free WiFi begin around 600 baht. (All the way up to over 3000 baht per night too.)
"I've been using TA to find a place close the beach and rustic...."
Pattaya Beach sucks for actual swimming! (Okay for restaurants, shopping, malls, nightlife, etc.) Pattaya is a beach CITY but you can relax in many cheap hotels. Windows shut, most rooms, even cheap hotels are reasonably quiet. What price range?
What do you expect for "rustic?" Too far out from the city area you need custom transportation. City area you walk to most things or can use cheap 10 baht (about 35 cents) transportation.
Knowing a price range eliminates places that don't fit your budget. Either side, too cheap or too expensive.
Book a night or two and then look over some other places if not pleased. Unless it is around Christmas then keep what you get!
(Too far from city area for me.)
Up to you.