Welcome to the site twerp, on the topic of hubs, a hub kit for you Tundra runs around $800-$1000 for parts alone, then depending you may or may not need new wheels if the hub doesn't fit through your center bore. Its driveway do able but I don't know how mechanically inclined you are. I know for TJs swapping the auto hubs for manual ones doesn't net that big of a gain. Something on the order of .5-1 mpg.
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