You can find higher ROI (on paper) here and probably in other cities…but the probability of actually collecting rent significantly decreases.

I feel like there was a slight decrease in Austin after the surges in 2020, but the rest of Texas is still growing like crazy.

( difficulty reselling the unit, and it has a small percentage risk on your health)I would like to know if the value of the condo will decrease overtime and your thoughts about the situation.

The maintenance/cap ex allocation decreased with the rehab.  

How can I pay mortgage so it will be in my favor and see a drastic decrease in my mortgage instead of paying tons in interest.

This will impact the entire market if folks don't update their rates and hosts will be shockingly surprised when they see their revenue sharply decrease.  

Quote from @Carlos Ptriawan:  They believe that they will increase the properties NOI by 45% over 5 yr hold, mostly through rent increases after doing 5K interior upgrades in all 252 units, thus adding 19 million to value of property. how is it possible increasing rent 50% in 5 years period in place where comps and rent is decreasing, this local market is extremely saturated.For me if I have to buy in Austin I would find complex that could give DSCR 1.3 at least with 80% occupancy.if they increase rent 50% then we should do intelligence on their closest neighborhood's rent. 

Figure between solar and not having the car loan, my monthly bills will decrease by $1000.

There are TONS of opportunities to buy properties cheaper and rent them.Population growth past 10 years - depending on your source, you should see stagnant growth, a slight uptick or a slight decrease. 

See the graph below and notice how DOM increases in the winter months:Again, your idea of offering a commission/fee that decreases the longer the vacancy sounds logical, but in practice is impractical due to factors outside an agent's control.