Because my transaction is fairly simple, could I just do the papers myself and simply have the title/escrow companies transfer the funds from one office to another?

Best to avoid this fund and go with a proven track record. 

I want to keep the property longterm since its a good rental and the interest rates unbeatable but I want to pull by 10K downpayment as well as renovation budget out of the property.Has anyone ever had any sucess refinancing a portion of the home while still keeping seller financing in place? 

It will depend on interest rates. 

Same goes for number of LLCs and what to fund them with, since bear in mind that CA tends to be more cumbersome and expensive to have LLCs than other states.California is generally more cumbersome than other states when it comes to taxes and filings.

Most work this way Rates: 9% to 13% (Most Deals are 11-12%)Terms: up to 36 Months (Most Deals are 6-12 months)Fees: 2-4 points(%) of loan amount paid at closing (Most Deals are 3 points(%))Minimum Loan Amount: $50,000 (For loans less than $250,000 $2,500 minimum fee)Max Loan: 65%-70% of After Repair Value(ARV)100% Rehab Financing Available (Require 20% of purchase price down payment or cross-collateral)Closing Timeframe: 48 Hours - 3 Weeks (Most Deals are 2 Weeks)NO PRIMARY RESIDENCES, NON-OWNER OCCUPIED ONLY, BUSINESS AND COMMERCIAL USE ONLY.

What occupancy rate have you gotten throughout the last year?

Is that simply the process no matter how many properties an individual or fund implements? 

Getting the best interest rates, doing (re-)taxations, changing the percentage for a down payments that needs to be paid or for the % in refinancing to get back.We are actually planning our next meet up in Barcelona about refinancing where a mortgage broker is coming to have a talk.

I check the SEC, FINRA, ratings websites for inside information on the principals in the company.