You can get double bonuses by claiming them on your save on the 3ds, transferring that save to the switch and then claiming the bonuses again. They don't have a way to check if you've already received them yet!

Goto the palico in your room on the 3ds. Hit the DLC menu. Download all the shit. After words, talk to him again and claim it. THen transfer your save to the switch and do it again.
Basically you'll get all the eggs you need to never have to worry about money in the game, not only that, but those slick pickaxes come in handy.