There are a couple of big things with an LLC: liability, and taxation.
From a liability perspective, setting up a valid LLC (operating agreement, bank accounts, registration/licensing with the state) is very important. If you are aiming to manage liability exposure, you definitely need to conduct the LLC's business in it's name: transfer title, leases and agreements, separate bank account, etc.
From a taxation perspective, you'll need to do more paperwork. With unequal shares, the LLC is a partnership from a structure perspective, so should provide pro rata distributions to you and your wife. If you file jointly, it will just be combined again for taxes, but you need to get everything filed.
My advice is actually to go talk to a good accountant/tax pro because that is the part that will be more work (maintenance) long term than the legal piece. It will be cheaper per hour and they can connect you with a lawyer, if needed.
