Aside from that, working with attorney is a must in this situation to ensure proper ownership transfer takes place. 

If you decide to use an LLC, you'll want to form it before you enter into an agreement of sale since it could have realty transfer tax implications.

I have a California LLC and will put my rental property into my California LLC,I am sole owner, I will file a Grant Deed with my california LLC as Grantee,if I transfer my property into my LLC should I do 351 exchange ?

That is why people debate here if LLC is really required as you have to transfer the property back and forth from LLC to you and LLC to get a loan stuff. 

1.)Formation of LLC:a.Registered Agent: Attorney/registered Agent service addressb.Principal Office (Virginia): allowed to be same as RA address (attorney/RA) or USPS physical address (not PO box)2.)Transfer of Title/deed to LLC: Address of LLC owner for rental property = ?

But you'll need to be up to date on realty transfer tax issues and other possible legal issues when it comes to wholesaling. 

My company literally transfers amounts weekly (automated transfer) from the company operating account into the separate reserve account as part of our reserve implementation.

Seller wants to close on the house without transferring the keys to me during the close and suggested that I change the locks as soon as I close.

-The seller would first transfer the house into a new LLC.

Maybe with a few properties it would be manageable but for 300+ it would have taken too much work to transfer payment data into the forms required by the credit reporting agency every month.It's too bad they make it difficult because rent is typically the largest payment made very month and is a great indicator of credit worthiness.