You are right to say you can lift 30', and you can. However you must be aware the two most critical reasons for a drip trap, which are start-up and upsets. During start-up, with the highest loads, you have the lowest pressures. Unless you are willing to manually drain the drip leg during start-up, then do not have much lift after the trap. For upsets (ie: a slug of condensate entering the drip leg), you need to remove this quantity of water ASAP so it will not back into the pipe and cause dangerous water hammer. The lift will reduce the capacity of the trap and it will take longer to drain this slug of water.
My recommendation is to keep the lift to a minimum and install a condensate pump where required and THINK SAFETY FIRST.
Again you are correct. You MUST size the condensate pipe on the flash steam flow at almost zero pressure (meaning atmospheric steam which has a specific volume of appx 26.8 Cu. Ft. per Lb.). If you do this you will have no worries on the friction loss for the water flow because the pipe will be large enough to provide a very low velocity of the water and almost negligible pressure drop.
3. Pitched Line
Once you get the condensate up to the main line back to the reciever, as long as it is pitched correctly and sized right you are using our good friend gravity to make the water flow. There is no length restriction unless you run out of height and you can no longer pitch the pipe.