Need small business ideas with a budget below 5L as 2nd income

Already investing, so ruling that out, gold also topping up now and then.

But looking for a small business which pays out to me monthly as a side business. I have some ideas but don't know how much practically they are possible and the gross margins they give.

The ideas:

• Tea counter in busy area, or in some highway exits.
• Cloud kitchen with salads, juices n smoothies as I think it's low maintenance compared to cooking.
• Need some more ideas with real practical approach if anyone has done it already.