The bank account verification allows me to accept 1099 workers , business owners, and side income verification with a high level of confidence.

Hi Navid-To start, I am sorry to hear about your father's dementia.It is fortunate that you were able to sell his business and he invested in 6 investment properties in California 10-15 years ago and he and your mother are living on the cash flow from those.You now are thinking about expanding your father's investment real estate portfolio because California is so expensive to live for them but don't have the same experience and confidence being new to investing.This is an honorable goal and you are right to be cautious and thoughtful.You asked about whether you should cash out refinance each house or borrow against all houses to get downpayment for new properties.

I would ask yourself this question...Am I buying this service/program to change something about myself I know I can do but lack the confidence?  

Is the fact that the investment will be backed by the apartments and 54 acres of land a reason to have confidence in the project? 

Do people have confidence in the multi tenant industrial market today?

Since you'd be looking to hold this property long term, look at what the property's cash flow and appreciation would potentially be 5-10 years down the road to help inform your decision.All that being said, if you feel confident that you can cover the maintenance, capex, vacancy loss, turn expenses, and leasing costs for a few years while you wait for the cash flow to improve, and you have enough risk tolerance to handle a potentially difficult tenant in the first few months which could lead to zero rent coming in during that transition to getting a new tenant in place, then it sounds like a solid deal to get into with $0 down.Lastly, I'll also caveat all of my statements above by mentioning that this all requires you to self-manage the property. 

It should strive to become and remain proficient in its field and be competent to properly address issues which arise in connection with the ownership or collection of debts.CANON 3 – CONFIDENTIALITYAn RMAI Member shall always demonstrate their commitment to maintaining the confidentiality of consumer account data which shall be revealed through the development, implementation, monitoring, and annual review of security measures adopted for its protection, not only while having title to the receivable but also during transmission of the data occurring during the sale or purchase of the receivable.Commentary:A Member shall strive to implement the highest standards of information security policies, safety, and security plans and guidelines which meet or exceed any state or federal statutory and regulatory requirements for the safeguarding consumer personally identifiable information and account data.A Member shall abide by all non-disclosure and confidentiality agreements with the parties with whom it has business dealings regarding the other parties’ consumer accounts, proprietary business information, and trade secrets.The obligation to protect confidences does not preclude a Member from revealing information when consent is provided; as permitted in statute, regulation, or case law for the collection of a debt; or when required by law.It is not improper for a Member to give, as allowed by law, limited information from its files to an outside agency necessary for statistical, bookkeeping, accounting, data processing, banking, printing, or other legitimate purposes, provided it exercises due care in the selection of the agency and warns the agency that the information must be kept confidential along with the execution of proper confidentiality agreements.CANON 4 – COMMUNICATIONSAn RMAI Member shall demonstrate caution in its verbal and written communications with others which shall be revealed through the absence of false, fraudulent, misleading, deceptive, or unfair statements.Commentary:A Member shall accurately represent professional memberships, designations, credentials, capabilities, and experiences.The name under which a Member conducts its business should not mislead others concerning the identity, responsibility, and status of the Member, even if such name is permissible under the FDCPA or other state and federal statute.A Member shall not directly or indirectly compensate or give anything of value to representatives of the press, radio, television, or other communication medium in anticipation of, or in return for professional publicity in a news item unless such payment is disclosed in such news item.

Or at the very least some positive feedback/ vote of confidence because this road is extremely overwhelming and very pressured to quit or slow down.

My advise is this, if you use their services can you really feel confident in anything that they say?

The variables are skills, confidence, and love of the game.