Ah it's a "remote tune" then. So one has to either buy the data logging stuff or rent it from the remote tuner. What does that run and is really worth the extra cost for a stock car w bolt-ons..?
So often are you making tuning adjustments? Are you buying new parts each week that require a tune? Is this a race car that you take to different parts of the country so you have to make adjustments for weather, altitude, and such? Or do you have a street car and maybe it's a little muggy out today so you "fine tune" it so it won't ping on the way to 7-11?
I'll break it down real simple for you since it appears you don't have any experience beyond fox body cars.
There is no data logging stuff to buy. You can use the SCT tuner device and a lap top or in the case of Lund data log right with his ngauge.
Whether you tune on the street or on a dyno you still must purchase an SCT tuner. Either an X3 or X4 for these cars.
You log the tune for the tuner and he will tell you if you need a revision or not. If you add parts later on and need a revision your tuner will email you an updated tune. Some parts require it, some don't. Tune updates are usually free with the exception of something like cams, E85, or F/I.
What you seem to be having a hard time grasping is the front o2 sensors are now widebands and will adjust A/F and timing by themselves depending on weather or octane of gas you are running. They will also pull timing if knock is detected.
Technology has come a long way since the days of putting a chip in a fox body. It's time to accept it.