I used 2 versions of the Conda. A pure trader and a CG trader (CG's have a much higher risk of running into pirates and other hostile CMDR's so I sacrifice cargo). My main trade ship can handle itself fine in random encounters. Organized and planned attacks takes some extra shield strength to survive.
CG Conda
Standard Trade Conda
Now before everyone gets all up in arms about the 4A shield generator, it works fine and opt/max is on hull mass (which is 400 on the Conda) and nothing else. Trust me. The only stat that matters on the Shield Generator is the MJS of strength. The CG Conda is pushing 1327 and the standard trade ship 969 (which is still stronger than most combat ships). Both of those are strong enough to deal with most player encounters. Its a trade ship, hence the reason for no weapons. If you get pulled over by a dedicated combat ship in a trade conda, and you try to fight you will most likely die. Better to just jump away, they can't follow you anyways. Most combat ships will not be able to catch up to a hi jump range trade conda. And if you get pulled over by anything less than another Conda, they can't mass lock you so you can low wake.
Also, O.P. The 7D are only offering you 1100MJS shield. 6A's will give you more shield strength and allow you to carry more cargo. If cost is an issue you can go with 6C's for now and be at 1057 shield strength compared to 1176 but have 400T Cargo. Then when you can afford the 6A's you can slap those on and be at 1225 shield strength and still have 400T cargo. You are also shooting yourself in the foot when it comes to your jump range. with only 12LY jump range, that's worse than the T9. The biggest advantage to a trade Conda is it's huge jump range. 19+LY opens all kinds of trade routes to me that I otherwise wouldn't do.
A little background. I am Tycoon rank, have only ever traded in Open and have never lost a Conda due to CMDR interaction.
Good luck out there CMDR.