Sending products to Amazon FBA WH help !

Hi everyone! I hope someone can help me. I will get my container from Europe to Long Beach Port. I already have appointment for Amazon warehouse FBA in Denver. For save money it’s possible , get my products on a storage , then I can make the pallet by myself . And rent a truck to drive to Amazon warehouse in Denver , Colorado to send all my products in this warehouse ( already get the appointment and shopping plan ). I just wanna ask if someone recommended send my myself or using a 3PL but I think maybe 3PL are so expensive

Thank you !! Blessings