How big have the profits been?

Having identified the best investment options to explore, when I considered actually investing in these, another criterion emerged as important: I wanted to be able to open a small account first, to see how it did. Then, if the account performed in a way with which I felt comfortable, I could add more money. Unfortunately, not all managed accounts offer minimum account sizes that are small enough -- in fact most DO NOT -- and by "small" I mean only $5,000 to $10,000 to open.