You can't advertise and solicit investors, but its online behind a portals membership wall. 

Here is the existing survey for reference.

Try to make friends with everyone there - it will help you much more than your attitude right now.And the last: Nobody soliciting you to pay for Pro membership - everyone has their own reason why it worth for them.

I believe it all comes down to knowing the market very well, doing your own surveys, building relationships with the active brokers, and being confident in your projections as well as knowing the risks of missing them. 

I will look into a membership in the California Apartment Association as well as the other resources pointed out.If I go with property management, what kind of overhead am I looking at in San Jose, CA ?    

I recently joined a membership site for monthly coaching phone calls but thought it would be foolish not to take advantage of all the free resources I can.

Elmer, if your financing, a bank or SBA will require an environmental survey which should look into those types of issues.

@Shahadat Reza I guess you qualify for membership then! 

I am currently considering using whitepages.com to find property owner's phone numbers, but even with a whitepages.com membership the number of searches they offer per month is limited.

NAR Membership StatisticsMembers to date: 1,383,010 as of July 2019Number of local associations: 1,148 as of January 2019Source: Monthly Membership Report and NAR Membership Statistics, 1908-presentREALTOR® Demographics68% percent of REALTORS® are licensed as sales agents, 20% hold broker licenses, and 14% hold broker associate licenses.The typical REALTOR® is a 54-year-old white female who attended college and is a homeowner.67% of all REALTORS® are female, and the median age of all REALTORS® is 52.Real-estate experience of all REALTORS® (median): 8 yearsMedian tenure at present firm (all REALTORS®): 4 yearsMost REALTORS® worked 35 hours per week in 2018.The median gross income of REALTORS® was $41,800 in 2018, an increase from $39,800 in 2017.Median number of transaction sides in 2018:Residential sides for all REALTORS®: 11Residential sides for residential specialists only: 12Residential sides for commercial specialists only: 4Commercial sides for commercial specialists only: 4Formal education of REALTORS®:Some college: 30%Bachelor's degree: 31%Graduate degree and above: 13%Associate degree: 13%Some graduate school: 6%High-school graduate: 8%REALTOR® affiliation with firms:Independent contractor: 87%Employee: 5%Other: 8%