Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Does it make any sense to have individual stocks, bonds, preferred shares
Sure, with some general rules of thumb: what is the minimum portfolio balance to avoid paying too much for transaction fees? Well, the fee doesn't change with portfolio balance or order size, so I don't know what you're trying to do here.  The way to have less transaction fees is to have less transactions.  That means no day-trading, no option rolling, etc.  A Buy-and-hold strategy (with free dividend reinvestment if available) will minimize transaction fees.