This might be a dumb question, but he has to have his name on the title of the house before he can sell it, right?

The title of the thread isn't "multiple invest properties", it's "multiple properties"In the OP I specifically state the type of home (primary vs rental/investment) and the financing. 

Who is on title to the property is not the only inquiry to be made.

The fastest way to grow a small fortune in real estate is to start with a large fortune and then invest in Memphis without expert local advice :-).the absolute classic and truth in this thought process was the [post  2 or 3 weeks ago titled."  0 to 15 units in 12 months"come to find out west coast person decided it was a good idea to leverage their personal residence and buy D class 400.00 a door rentals in this market.. and I don't care what market any market this is darn near financial suicide..

The way I understand the Double Close is the Seller signs the agreement and then you'll need to take the agreement to a Title Company.

Roofstock offer to credit the amount of fixing the post problem in closing.We closed on Oct 24th, the title company used previous tax year to determine the credit for the tax in 2018 around $534.64.

We are just refinancing a loan.Here’s how it works:You create an LLCYou buy a homeYour LLC gives you a loan for the homeYou file the deed for that loan at the county courthouseYou use the money from the LLC to buy and fix up the propertyOnce the property is completed, your conventional lender comes to refinance the loan Your conventional lender runs title and sees there is a loan.Your conventional lender refinances you into a new loan, and cuts a check to your LLC in the amount of 75% of the value.Please don't confuse this 75% with a "cash out" amount.

Can title company prepare all paperwork for the lien or should I use my own real estate attorney?

There’s other contingencies you can use too, financing, feasibility, environmental, neighborhood review...Have your DD start the 1st business day after they provide you with all the documents, P&L sure, but also you’d want title docs, details on mechanicals like age, repair history and warranty status, insurance claim history for the last 5 years, every scrap of detail on any pending claims, zoning use confirmation from relevant govt entity, copies of all docs they have received from any govt authority related to the property for the past 5 years... there you’d be looking for code violations, notices from EPA or fire marshal, etc.  

Thanks for making me glad I tagged you, @Chris Mason .