Hi we will be in Bkk in the fall. I'm looking for a nice but cheap hotel with air, private bath and breakfast close to the sky tram if possible. I don't want to pay $70.- I will go as high as $50 if it is nice any help?

You can get the lots of info about Bangkok's hotels: Check the Following link and choose the best Bangkok's hotel.
Cheap Bangkok Hotels-A good starting point for budget conscious travelers seeking cheap Bangkok hotels.