One thing to also keep in mind is that if your wallet will contain a lot of small inputs, when you'll want to spend the tx fee will be (literally) huge.
So if you think on doing this (way too low paying) job, you'll have to find a way to consolidate your inputs.
I'm newbie, that's why i don't understand this. I thought that wallet contain an consolidated amount and fees for all those small inputs are already paid?
Would you be kind, and explain it more or link me somewhere where i can read about this?
Thanks in advance.
Sorry for such late response, I somehow missed your question.
Non-technical answer: you get a lot of pennies in the wallet. They grow and grow. After years you want to spend and you'll see that you have so many coins you will need to rent a truck to carry them. That may cost more than your pennies.
Technical(ish) answer: your wallet knows only that your money consist from the result of transactions X, Y, Z, T, ... When you want to spend, a new transaction is made getting those "outputs". Those will become the "inputs" for your new transaction. The more the inputs are, bigger the size (bytes) your transaction will have. And the transaction fee is per byte of transaction size.