Note, all your Play! Points can not come from league, you can only get 1 point per league season regardless of how many leagues you attend. Between the start of the season and Nationals you can only earn 6-7 Play! Points from league depending on how the League Calender compares to the Season Calender. You are going to have to attend tournaments/premier events as well.
Funnybear- Those without a league nearby can still attend Battle Roads/Cities to pick up points. They don't have to go to 5 major events to qualify for Nationals.
Unless you live in a place with little or no Organized Play, 15 Play! Points is very easy to obtain. As of yesterday afternoon (pre-Week 2 States uploaded) over 1100 Master Division players in the United States have 15 or more play points. With Weeks 2 and 3 of states, another Regionals and another round of Battle Roads, another 800 players are with in 5 points of the 15 Points needed to qualify for Nationals.
PokeChump- If you are in Central Florida, there are events in Orlando and on both Coasts. Where are you finding the information for your local events at? As a former resident of Florida, I refuse to believe that you have this great hardship finding events close to you.