Hi everyone.What kind of contractors should I have on speed-dial in case of any emergency repairs?

Obviously this system is not perfect but it is a good speed bump for a new investor.

God speed @Genny Li  The Cultural Revolution is as terrifying as anything in all of history which is saying quite a lot. 

Concentrating on a specific strategy will help speed you through.

Speed is key with this service.3.)

Turn washer spin speed up to the highest setting because they're unlikely to change it..5 GPM aerator on bathroom faucets1.25 GPM aerator on kitchen faucet1.25 GPM showerhead1.28 gp-flush toilets--I'm only replacing them because they're the horrific 90s toilets that clog CONSTANTLY, as the water savings will literally never pay offNew tub spout diverters because the current ones leak around the edges badlyY-splitter on top load washing machine to connect the washer only to the cold supply (it's not a high-efficiency, so it cleans well at any temperature) Smart thermostat with 74 degrees minimum cooling temp and 71 degrees maximum heating temp until 10 pm, dropping to 68 degrees until 6am Alarms on doors and windows that alert me if either is left open while the heat or AC is onNew windows, because the current ones are single panes in need of heavy maintenance and are already causing problemsPossibly solar screens on two of the windows that get the most light, particularly a west-facing one

Everything you mentioned other than windows will bring rental value / speed to you. 

That gives you 60 extra weekdays to get up to speed on stuff that requires a lot of uninterrupted brain power.

Eddie Speed who runs noteschool.com is one.

Find a good one and keep them on speed dial.