Building a track record with your investments & investors (doctors) will organically grow your investor network through referrals. 

Give this Realtor Mag  article a read What Unlicensed Assistants Can Do in Your State it breaks down the specifics for every state, California included.Here is what unlicensed assistants can & can not do in my home state of Ohio.DOS AND DON’TS FOR UNLICENSED PERSONAL ASSISTANTSDO: Call people to schedule appointments.Call the owners of properties listed by the brokerage to schedule showings, closings, or inspections.Prepare market value analysis forms.Compile listing packages.Prepare listing presentations.Write and place advertisements.Take and develop photographs of properties.Address and mail open-house invitations and thank you notes to open-house attendees.Deliver documents such as offers and counter-offers.Coordinate direct mail campaigns.Create flyers and brochures.Maintain mailing lists.Monitor closing details.Coordinate closings.Communicate with sellers and buyers regarding delivery or pick-up of keys.Process sales.Enter listings on office “listing board”.Mail copies of ads to sellers.Install and maintain “For Sale”, “Open House”, and “Sold” signs (after satisfaction of contingencies).Coordinate sending of gifts, flowers, etc.Order legal description and plot plan.Prepare open house materials and prepare and mail highlight sheets as needed.Submit earnest money to secretary.Assemble For Sale By Owner and expired leads for follow up by REALTOR.Mail expired and For Sale By Owner letters.Assist with organization of agent tour.If and when property is vacated, periodically inspect and oversee maintenance and care.Install and remove lock boxes.Input listings into Multiple Listing Service and handle Multiple Listing Service changes.Map properties for showing to buyers.Inform seller or buyer of title transfer and deliver or pick up keys.Communicate with escrow officer/branch escrow secretary to keep up to date on all activities during the escrow period.Gather the names, addresses, and phone numbers of all parties to the transaction, including sellers, buyers, REALTORS, loan officer, title company, etc.Keep calendar of all important dates, i.e., loan application, loan approval, inspections, satisfaction of contingencies, title transfer, etc.Attend sales meetings at request of REALTORS.Process incoming and outgoing referrals as deemed correct by the company.Special events promotion, organization, and implementation.Handle bank and trust deliveries.Handle all transaction record-keeping in an organized, complete, and clear manner.Search legal and/or city/county records.Compile information and keep records for income tax preparation.DON’T: Make representations about the services offered by the real estate brokerage.Interpret documents or answer questions concerning documents.Ask, answer, or discuss questions concerning asking price, address, number of bedrooms, or other qualities of a property.Ask owners questions as to their housing needs in order to determine their interest in listing their property.Gather information on an owner’s house or a home an owner may be looking for.Provide information to the owner on properties listed.Request the names of others interested in buying or selling a property.Direct or assist in the procuring of a prospect which is calculated to result in the sale, lease, or exchange of real estate.Here is another example.

I'm a consultant for nonprofit organizations in international development, looking to diversify my income and eventually transition to the business full time.

Even if the county does object, they'd have to start the clock on the day of the complaint and wait for 180 days, keeping track of every day when someone slept there and when they didn't.

You'll want to take a step back and look at objective information on markets and neighborhoods (characteristics, demographics, rental trends, etc).Property management does not need to be vertically integrated. 

This is a far superior strategy than speculatively trying to guess where market tops and bottoms are.In the same way, you should start with smaller deals to get a greater understanding of the business and build organically.  

organizes.

I don't want to share anymore of what I might offer here unsolicited, but if you're ever looking to expand your team, I am possibly the most organized human you've ever met, (or at least in the top 3 ;)), am passionate about this field, and am looking to get connected with a flipping team to add my strengths to.

See following for more on this.https://www.irs.gov/uac/form-990-t-exempt-organization-business-income-tax-return

The socialist wing of the Democratic party (tenants' rights, low-income advocates, non-profits, unions, etc) got this over the finish line over the objections of landlord organizations.