I recently decided to leave that world, mainly because as most of you know, politics suck.

Option D: If any of them balk at the rent increase I could decide to back out of the rent increase as well by telling them I've decide to not increase the rent after all, etc.

However nothing you wrote changes the facts1) You are paying someone to perform tasks you are doing yourself (Paying a kid to cut the grass and then deciding you want it at an angle so doing it yourself).2) You have a personal attachment to your investment with a value more than money3) Your tenants are legal tenants and are in possession of the property and have "A right to quiet enjoyment" of the house.4) Your neighbors can call you 50 times a day and there is zero you can do, without having specific things to write up for lease violations.

It is hard to open one.If anyone did not know, the FAA basically decides where all commercial airports are located. 

Read about both professions, interview people in such professions already about their daily lives and then decide for yourself which one is more suitable for your personality.

I got countered at 60K and decided to withdrawn my offer as he isn't willing to lower as I was told the property is paid off free and clear, and he doesn't seemed rushed to sell or willing to below market value. 

Some of things I consider besides the analytic part is the number rentals available, rental comps, number of house for sale and date of availability.I've been looking daily and I'm having a really hard time deciding where, I wonder if people do end up with a duplex in every state, lol. 

My advice- back up and decide what you want out of your real estate investing career.

-If I decide to live in my first purchased property and stay close to LA, would you recommend buying a duplex/triplex and I live in one of the units and rent the others, or buy a SFR and live in the back house and rent the front?

My advice get many different terms and decide which one works best for your investment.