@Robert Morris it can work - until it doesn't via a lawsuit.Challenges:1) They are NOT professionals2) They are not licensed, so may cause you legal headaches3) They won't have insurance, so what happens when their actions lead to a lawsuit?

Many people say "I know for a fact none of my family has judgments" but family members regularly do not discuss their financial problems with other family members, may be unaware of legal issues and their standing, and there also could be fraud.You should also consider any prior spouses among the parties that ever lived at the property as a marital interest attachs regardless if they were on title unless resolved by express court decree (in which case former spouse should join the conveyance).An attorney is not required - though you will need a properly drafted deed, GITREP form, and affidavit of consideration to record.

However legally the LLC has a different address than my current home address or PO BOX. 

The allocation can affect property taxes and legal responsibilities.

Especially true in CA like @Bruce Woodruff said @Sipan Y.Did you check the local regs in those areas where you are looking to make sure it is legal there?

My area of practice in the legal realm is trust formation for businesses and individuals.

Quote from @Ross Kane: To expand on the LLC protection theory:An LLC is useful for two things: anonymity and legal protection.

Additional units will add a HUGE layer of risk that will be accounted for during underwriting with this scenario as you are very clearly purchasing the home in WA with the intention of renting it out for cash flow (that's not a primary residence, but an investment).Personally, I would advise you to do this as a second home transaction, as the second home scenario makes a lot more sense to me from an underwriting/guideline perspective. 

Is it legal for a family member to deliver the notice? 

No, these are all carefully chosen and will never be negative.2) Using someone else's employees at nights and on weekends will definitely save you money...but it is not legal.