Entity Structure (LLC, S-Corp, None, etc.)

Hello, I am planning on setting up an entity for my search. I would love to get people spots on the proper entity and the benefits of selling it up one way versus another (ie LLC vs S-Corp). My goal is to be able to run expenses through it during my search, to use it to acquire my business, and then to be able to deduct the expenses from searching as costs after I acquire the business for tax purposes. I’d love thoughts on the best way to do this and any tricks/tips. Also if I’m missing anything on ways to optimize cost reduction through this. Lastly if you’re familiar with SBA Loans is there any issue using the entity to acquire the business instead of personally acquiring it as an individual.