Keep the ASP and do not waste your time with T7 or Boeing.. pardon Clipper. Both the clipper and the T7 will not increase your profits over a well fitted ASP.
ASP with shields can have 96 cargo, land at outposts and jump 25 ly+ all in the same package. This allows you to make a 10 min run with 400k profit. Even if the Clipper might turn out slightly better, the time you would waste to grind the rank + the money for it are not worth it. Better use your ASP well and instead of buying a 30+m Clipper and grinding the rank for it use the 5-10 hours to get 20-30 mil with the ASP and just buy a Python which is the best trading ship in the game in my opinion. (investment to profit ratio, mobility, defense, armor, speed, cargo, jump, easier docking)
Honestly... why would you Imperial fanboys advise him towards getting a clipper over a T7? What are the benefits really? You say it is more worth because of mobility and cargo? Like 216(t7) vs 184(clipper) cargo is worth grinding REP missions for a couple of hours? For what? A downgrade? Mobility? You are not going to dogfight with it. Heck you might even use a docking computer to dock it so the time flying it is minimal and the docking computer removes the benefit of mobility...
Why? Why would you trade in that jumbo-jet?
Why not get a Federal dropship thenIt can even land on outposts it has a durable and rigid hull and can even be run without shields + 168 cargo! NO! WRONG!
Use your ASP, don't loose your time and cash for anything else to gain 10-20% more profit.... Once you get to Python you will use the same route as your ASP to go to outposts and almost triple your Credits per hour.
This is utter nonsense. It doesn't take long to jump an extra system (even two), no more than maybe 2 minutes to your round-trip time. During that round-trip you've hauled an extra 200 tonnes of goods, which should net you around 200,000 Credits more. A fully loaded Asp is not notably more manoeuvrable than a fully loaded T7, so long as you use the T7's fantastic yaw rate to its fullest, so you're not saving more than a few seconds during docking (most of which is offset by the relative difficulty of actually landing the Asp).