As for a 3-season vs a 4-season tent - if you aren’t planning on doing any winter camping, then there is no need to spend the extra money on a 4-season tent.
As for a 3-season vs a 4-season tent - if you aren’t planning on doing any winter camping, then there is no need to spend the extra money on a 4-season tent. A 3-season will work just fine for your purposes.