We didn't pay anything down and we got a rate of 3.6% which is hard to beat compared to a regular conventional loan.

@Dillon McGough  Location,Security,exit strategy, Good Project management/Contractors is a must.

You need a loan not secured by collateral or something based on the new property. 

Since it comes with a higher risk, it costs more than regular mortgages. 

The first home secured the LOC, the second home secures the addition because once you pay cash it is free and clear. 

There are a few of us locals trying to start a regular happy hour, keep me accountable, gathering.

Don’t touch the security deposit until she moves out.

Or should I go with just getting 2 or 3 secure cards  to start building my credit and ignore taking care of the debt (credit score-610)?

If you are looking for some off market or wholesale opportunities there, or other parts of Greater Phx area, PM me, and I would be happy to pass along the ones I get regularly from my network of wholesalers. 

They have online training for their agents and they have regular team building/training sessions, where they discuss various topics.