You'll need an order of magnitude more than 20k USD to reasonably affect the LTC price.
Good luck with your efforts but you're pissing into a hurricane with that amount of cash.
I have my own plans for the LTC price.
Fontas is here.
LTC price to hit $50 by tomorrow.

Fontas is correct at least. $20k USD? There is a $20k USD buy wall at 2.64 right now alone. The other day there was an $800,000 sell wall.
There are some big players on there that indeed do get to decide where a coin will go.