You sound just credible enough but your info is almost all wrong>it'll be old and used
Not really. That may be true for plug n play types but even those have been decreasing in price. Kits are definitely the best bang for your buck and for $500 you can get a pretty decent one.>higher-quality printers use ABS
Neither are considered particularly high-end or exotic. Anyone who says you can print one but not the other is yanking your chain.>depends on the manufacturer
No, it depends on your hotend. PTFE liners are usually the limiting factor in cheaper hotends because those can't go above 245 °C. All-metal hotends can get hotter for filaments like nylon.>>495046
All filaments are not the same.
PLA is pretty friendly for beginners especially since you can actively cool it for faster print times.
ABS doesn't get stringy like PLA and can be vapor-treated for a nice finish. It's a bit touchy since rapid cooling can warp or separate layers.
Nylon has excellent layer cohesion and a low friction coefficient. Unfortunately, it warps like ABS and requires an all metal hotend.
PVA (as in school glue) can be dissolved in water so it's best suited as support material.
Ninjaflex is rubbery. That's all I know about it, really.
There are more but I don't know much about them and I don't feel like looking them up.