Virginia pine
Louisiana is a good climate to take advantage of their capability to double flush, like Japanese black pine. If I were you, read all the various posts and blogs about growing JBP seedlings for bonsai. In each of your trees, one of the branches from the lowest whorl of branches has potential to become your ''bonsai tree'' the rest of the seedling is let grow to thicken the trunk. The sacrifice branch, or the main trunk which gets sacrificed can be allow to grow to 10 or more feet tall. Adair has many posts on this technique also BVF.
But your location brings up another thought, the ''big flaw'' with Virginia pine is the twisting of the needles. This give a disheveled look to an otherwise decent bonsai, why not use a pine that grows very well in your area, JBP? Japanese black pine also has the benefit of being somewhat salt resistant, much more likely to survive a brush with a hurricane. With all the water I see in the background of your photos I assume you are in an estuary environment, and salt spray during a bad storm could be a problem. JBP should tolerate this better than Virginia pine.
So if I were you, I would start a fairly large batch of JBP from seed, because in as little as 8 to 10 years you can have fairly decent looking smaller sized bonsai trees, and in 15 years have decent looking medium to larger size bonsai trees. JBP grow fast in your climate.