What's your question? Ask

This article should help: https://www.gardeningknowhow.com/plant-problems/pests/insects/prevent-caterpillars.htm

Likely, the wind is not so much the issue as the salt in the air and soil from being close to the ocean. These varieties are recommended for their salt tolerance and will work well in your zone: Magnolia virginiana and Magnolia grandiflora

The Neem oil will not hurt the new leaves or blossoms. It won't harm the other nearby trees either, as it is safe to use for plants, people, animals and even pollinators. It only targets the bad insect pests. Neem oil also doubles as an effective fungicide, so it can help with any fungal issues that may crop up as well. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm

To start, here's some basic information: https://www.gardeningknowhow.com/ornamental/trees/magnolia/magnolia-tree-care.htm
There are many things that could be the cause of non-flowering magnolia; a big one is simply that the tree's not old enough. Some varieties don't flower for ten years or more. Sometimes there is too much nitrogen in the soil, or not enough sun falling on the tree. Also, the hard winter could have taken a toll on the buds.

Magnolia is not a specie that requires much pruning, other than removing dead or damaged branches. While you can prune young trees ( that you can reach without a ladder) lightly, pruning older trees is not advisable. This article will give you more information: https://www.gardeningknowhow.com/ornamental/trees/magnolia/pruning-magnolia-trees.htm