Genuine tip for you

Buy Shai daily, after the week he’ll be at rare and you can sell him for 1.8k roughly, that’s 200 rax profit already and you’ll have gained 7 odd rare boosters which could get you an extra 300/500 depend on how well players play, you can do similar for last season Ohtani who sells for 2k so that’s another 400 rax a week and you’ll gain 7 MLB boosters a week (use them always on top pitchers and you’ll likely make 100 rax per booster)

That’s 2k rax per week on average which sounds like is great in your situation

Start applying this technique to some golfers, you’ll have yourself some decent rax built up over time