As others have said, the Avenger is one of the few ships which sits at a nice price point and is a lot of fun for doing multiple roles. Its a nice looking ship, has an interior which allows for cargo space, and its pretty competent in a fight. Really, all the things it does, its better than any other ship of an equal price.
I do wish more ships were module based like the Vanguard, Retaliator and Caterpillar, so 1 Avenger could do cargo AND bounty hunting (and E-War too) from a base cargo ship and the rest bought in-game etc.
I bought a HOTAS for SC, i bought it because i want that immersion, the connection to the ship. The different controllers all have their own perks, one of the downsides to a HOTAS is aiming, its far far easier when the ship rotates to where your mouse is pointing, and the gimbal turrets can rotate and shoot at what your mouse is hovering near. Your aim with a HOTAS is where your nose points.
SC aims to help by essentially applying a penalty to gimbals, so a size 4 gun mounting point can have either a size 4 gun hard-mounted/fixed, or a size 3 gun on a gimbal mount. So its harder to aim on target, but when you land a shot, it'll be more powerful (iirc, each size up is ~50% more powerful... more capable really, like-for-like).
Im not into SC for the combat though, which helps, it wont be so essential, it'd be like playing AC for the enjoyment, rather than looking for pure speed benefits. KB+M seems like the best solution, everyone has them, theres no real punishment, its ideal for non-flight stuff (walking & shopping, fps combat, game interaction such as mobiGlas etc), whereas the HOTAS is good only for flight and could get in the way of your KB+M access.
I've actually got my setup so i can flawlessly have my KB+M where they'd be 24/7, the HOTAS firmly mounted where its comfortable... and my wheel & pedals can remain in place. That isnt really easily doable for most people, it becomes expensive, compromising, and possibly inferior to the simplest option.
Its a bloomin hard sell in all honesty, but on the rare occasion i fire the game up with the HOTAS set up, i really enjoy it. I'll use it constantly when its at a point where im playing the game constantly, for now mouse is quick and easy.
Glad you liked the free-fly enough to want to buy it, but i suspect you'll jump at SQ42 too when thats gets released

theres a lot of work & content happening for that we're not seeing, and unless your mostly interested in trade & industry stuff in SC, there should be some quality combat going on in there and stuff that will be seen & experienced first in SQ42. The good thing is you can add it on later if you change your mind and im pretty sure theres no price increase because you didnt buy as a bundle, you're not punished for having a change of heart.