Ended up with two separate lines of credit that I can draw against only when I need them. 

Draw up the contracts.

The first thing you migh need to do is walk your existing property and identify every single existing room with exact or near exact measurements noting in particular walls as some can exist as load bearing walls, important structural members for the exisiting structure, Make a scaled down drawing of the exisiting .Use for example 1/4 inch equals to 1 foot.

Even if you have a project designed for you the design still needs to be brought to a structural engineer for structural calculations and structural drawings in order to present your project to your local building department for approval.

Partnering makes is much easier to get started, because you can draw on each other's experience, skills and background to fill in where you lack. 

Have her draw up another will with a later date .

I obviously need an attorney to draw up an assignable contract or is there a boiler plate one I could access?

Is it as simple as establishing contact, creating a relationship and drawing up a purchase agreement (obviously with title and inspection contingencies)? 

@Chris Roche80% LTV is at around 5.5% APR depending on property, value (appraisal done via bank - 3rd Party).Also dependent on credit score and DTI.It can float, so if you take a draw make sure to call them to “fix” it.

Also ask about tax gotchas (some cities tax investment properties 2x what they tax permanent residents), insurance gotchas (be careful buying near the coast when a tropical storm is coming), and what draws people to rent in the area.If you like one of the agents, you can sign an exclusive buyer agreement BUT make sure it only applies to their target area (I think most are state specific) if you plan to look in multiple different cities.