Nah. If you want to get a good team in Genshin you will grind. You can't buy the most cumbersome progress items. The actual hours of grind are the same no matter what.

If you pay, you'll be able to farm for these items longer in a day. But it will still take the same amount of runs.

The longest grind are artifacts. To get the best artifacts for one character you will need to clear a level 2000-3000 times. That will take you 80-300 hours pretty much no matter what. Now those could be over 100 days or it could be in twenty days, but you'll have to run the level as many times.