To add;
I think people don't understand how easy it is to go from a cash account to a margin account. On margin, there are no settlement waits. Also, if your only trading pennies, you still trade on margin, but with a 100% equity requirement. So, on pennies, margin is not much different than a cash account, you just don't have to wait for trade settlement. Most brokers require 2k balance in the account to request a margin acct, and you need to keep track of day trades if your balance is under 25k.
Usually it is a simple form you fill in and fax to your broker. Very easy.