Remote Tuning

Ok all I have all my parts ready to install. Once finished I will have Curt handle the remote tuning. For those that have done it remote how long between uploads and communication back & forth did it take? I have access to a dyno but it will cost me $250hr. Other option is in 🇲🇽 where I have a few open long farm roads. Is dyno better or street. The shop where I can rent has said he's seen remote tuning done in an hour and take as long as 8, sometimes more. Hasn't had experience with dusterhauff or others in the mopar world doing remote tunes. They primarily deal with mustang tuners when remote. The shop is familliar with Mopar but primarily the LS stuff. I'd have them tune it but I want the flex. It will be flex tune with a 2.85 and a straight pump E tune with a 2.65. Not sure what I should do here. Let me know your thoughts.

Regards,