I am totally doing this. I did it with my python, and I really enjoyed building my ship one module at a time.
OK, can confirm that this is a Good Plan. The Anaconda has made me over 10 million just since I posted about considering the upgrade this morning. There's nothing I need to upgrade at this point, if I'm only doing solo trade loops with it - I've D rated everything other than the FSD which is a B, stuffed it full of cargo racks, and it's definitely a step up from the Python for that purpose.