I’m in the process of finishing the basement and adding an additional 2 bedrooms and 1 bathroom.

Does anyone have any suggestions or pointers for a Credit score, lenders/broker, location, down payment amount (15%?)? 

As Chris mentioned it works the same, however, the tax credits and incentives may be different for a primary home vs a rental.

In addition, it would seem that you would lose the stepped up basis at death if you are on the title.I suggest you consult a CA profession tax consultant and possibly a CA probate lawyer.  

Lines of Credit and Loan Opportunities: Access to credit is vital for real estate investors to purchase or renovate new properties.

You'll need to find a small local bank or credit union that might lend to you.2) Will your grandfather cosign for you to compensate for your lack of a job?

When there are charges, Obligo pulls the funds from the Tenant's bank account or credit card.

Lastly, if there is imputed equity, some lenders will give you credit for this but usually requires a story, and not merely being purchased well.

Has anyone used a business line of credit to put money down on a hard money loan to buy a flip?

@Samuel Metcalf- Most HELOC lenders  only lend on primary homes ...the  few lenders that do HELOCS on  rentals will likely have a low  CLTV   ( and a high margin over prime  which will lead to a rate in double digits ) .. check  with the banks / credit union located close to the property  and  also maybe there will be some feedback on this thread  pointing towards lendign sources that might work