So I tried the standard plates and 2x2 turntables option. I am quite satisfied with the outcome. However, it does turn a 15 USD$ car into a 20$ one (give or take), if built with new parts straight from TLG. The standard train chassis is sold 2.29$, and the plates I used total 7.96$ (6x14 are 2.24 each, I used three, 6x6 are .62, I used 2). So it’s a lot more expensive to build in black, but then again cheaper than buying the chassis on Bricklink, the cheapest I saw being sold 42$!!!!
I usually don’t buy from BL as I find that people’s price for used parts plus shipping is generally more expensive than buying new....
Anyways, thanks to all who answered.