Are these my main options, what am I missing?

My main concern is resale, but if the numbers work well, why couldnt I do the same thing and sell the 4 units.  

I don’t feel like it will be difficult to find another bank to lend me money but since my property is under 5 units and therefore being valued based mainly on comps I’m worried I might get the same appraisal again.

These are mainly for retirees, high income earner doctor's or corp execs to park money, or owners that have sold off businesses.

I learn from one investor " Know you exit " It would be your choice to sell or keep if you know what your exit would be.

I am mainly concerned with the Houston market.

Currently the rent barely breaks even but the price has appreciated quite a bit.Should I have the condo sold today, I would have about $260k on hand ($180k down pay + $80k profit after exp.)After listening to some podcasts and doing research, I decide my main goal is to buy and hold for the passive cash flow.

Coupled with 12-15k in savings I could acquire again within 3-4 mos.Are these my main options, what am I missing?

Additionally the root systems of these large trees can damage the main water lines to the street, pop up sidewalks near the building, and crack the foundation of the building itself.A regular inspector is not going to do the plumbing.

Trust me, I know it's very possible and I know that's the main battle in this game.