A 401k does not require a custodian or a third-party administrator (TPA), and you don't need an LLC to have checkbook control for your 401k.

To Ned's point, a lot of state's either don't allow a 3rd party to collect, or place a limit on how much the 3rd party can collect of the overage. 

Don’t really understand how it will work and at this point I need a third party point of views.

The hard part is figuring out what you can easily delegate but that is true of most businesses (I was good at it when I worked for someone else, but not good at it for my own items but want to improve).  

Leases are for LTR properties.I don't use much of any paid 3rd party software and my house is pretty much on auto pilot.

The hardest part is understanding the laws in each state and making sure you comply to them.

AI is a newcomer to the party.

They are saying that the LLC can be added as an interested party to the policy and that will be sufficient.

Almost never the MLS.This sounds like a common story of out-of-state investors buying up class C with local third party management. 

The proper roommate addendum should reflect you adding 2 new occupants and should include language as such:the parties hereto agree as follows:1.