His other line items I'll ask to only give him enough to get materials and pay him once project starts, and the remaining of the 30% based on work progress, so I can protect my own assets.

If you're planning to contract out the entire rehab you should have a GC lined up prior to buying.

She is on the same line with 7 other units.

The thing with STR's is the Op Ex line items and even revenue are fairly dynamic and will adjust based on your business model. 

I found out that some of the local banks offer unsecured lines of credit for $30k-$250k.

If you have already created an LLC, you should have a business bank account to manage separate books and start building credit for that LLC by opening lines of credit, credit cards, etc. in order to build the credit profile for the LLC.

Always make the "ask" as if your pockets are lined with gold and you are genuinely offering them the opportunity to invest with you. 

I am trying to get everything in line before the hiccups. 

But if you know what you're doing, then yes, it's a way to get in front of the line, especially in a competitive market such as L.A.

I have language along those lines in the lease.Thank you.PS, I live in Indiana.