I completed my ATP at FTI in Miami, they had greater flexibility regarding scheduling than PanAm did, in my case. For the ATP-CTP, as previously stated, it's not an efficient use of time nor money for pilots already flying commercially and flying jets. Find the cheapest provider you can find. I have colleagues who got a discount doing both at the same provider. FAA has a pdf with approved ATP-CTP providers (
https://www.faa.gov/sites/faa.gov/fi..._Providers.pdf).