If you perform the repair personally, you have to be reasonable in charging fair market rate. eg. if it takes 1 hr of your labor for some handyman's work, $20-30/hr is reasonable, even you're probably paid much more in your own line of work.My suggestion is to first fire the PM who obviously wanted to skim some profit by inflating the repair cost while exposing you to lawsuits (remember you're in CA - a blue state and San Jose - a city with rent control).

one tenant said she has bed bugs, we sent pest control for 3 times, and didn't find any bed bug, he called city, and city said even he caught bed bugs some place else and placed into a jar, and showed to the inspector in the apt, we have to do a bed bug treatment?

I have money saved up and also have a line of credit I could use for the initial purchase and rehab. 

We stuck about 5k in it plus my own labor and are getting $850/month rent.Last fall we got the line on 2-12 plexes side by side, and 2 more 6 plex units.

So if an agent that deals with rentals as a primary and is in an area like NY or NJ says something contrary, trust their take on it.I would recommend saying something along the lines of: You are welcome to setup a time but your client will be responsibile for any fees associated with your services.

Overall, would it even be worth it to invest here even when I have more money down the line?

Did you remove the little feature that put a little red line under stuff I didn't spell right?

If it lines up with the meet ups, I'll be sure to join.

Then line up people for major items.

Remodeled 3 bed-1 baths typically rent at $1000.  2 bed-1 baths go around $850-$900.