The public is welcome to come to any of our meetings as a visitor, membership isn't required. 

Here are some elements of security to consider;  Building Entry Doors Access Systems - How do visitors notify tenants that they are at the entry door?

But if he is seeking companionship or more, it may be a good idea for you to send someone else to his apt when he requests a visit, or communicate via text or better yet a message system. 

I'd have thought the guy who was "smarter than google" would get a lot more than 71 visitors per week.

We're frequent visitors to the Bay Area (dad went to Berkeley, sister/brother-in-law work in Silicon Valley) and know the area. 

Then, sometimes passers by or their visitors are guilty.

Sometimes tenants or visitors from other buildings park illegally and then your tenants won't have anywhere to park. 

Expect typical cost per website visitor (CPLC) to be $1-4.

By working backward, let's say my website converts at 2% which means it takes around 50 visitors before I get 1 lead.

One  (the good one)  no compains in almost 5 years,  she pays on time (most of the time) her part of the lease,  one time I had a really bad tenant,  she was in her 20s with 5 kids and no job,  Housing authoirty was paying the 100% of her lease but anytime I was on the property she was with  some "visitors"     normally more than 5, after having osme discucions becasue she was not a clean lady I asked her to leave,  the good thing is she moved out without any legal action,  Be careful accepting the tenant,  even they are coming with the voucher,  you need to do your due diligence all the time,  credit score is not an issue but eviction yes Good luck