There are a few options(1)You can get connected with the larger wholesaler firms in the area (2) go through PCPAO site and skiptrace the buyers of similar properties as yours, (3) hunt down the agents involved in the sale of properties similar to yours or go to local REI meetings and pitch it to the investors there. 

I happen to be looking for gap funders myself for a number of my house flip projects in Houston, TX and finding gap funders or any kind of private money involves a lot of networking and putting myself out there to meet potential lenders.

The capital stack especially in CA is VERY complex and typically involves everything and more that you mentioned.

I’ll bet if Peace has a forum there’s people talking about BP and being negative “what they’re teaching takes so long!!”

This options seems to be your best bet considering all other factors.

Your best bet is to ask for referrals from professionals in the space: realtors, other investors, this forum, FB groups, etc.

It has taken four months.Unfortunately, when probate is involved, the process can absolutely drag out.

Many real estate agents dabble in property management without fully understanding the complexities involved, making it risky to work with them.

You can talk to the bank about a loan; however, my bet is they will want some form of contract and scope of work and will only pay him at set milestones.

Find an older one who'd rather sit back and get the interest than the higher return higher involvement of another flip.