Even if their pay doesn't increase this is a small enough change for most tenants to adjust to within their budget especially if they come to expect it with their next lease renewal. 5. 1-3% annual increases might not keep up with rent price increases in the short run.

There’s part of the answer.Anyone else experience this same increase in costs?

They will have to sell it for a loss cause nobody in their right mind will buy that  The increased developer fees is only going to impact the seller, because they are the ones paying for it.

Do you have any links on how long water softeners are expected to increase the lifespan of various components?

Rents will raise and property value will increase over the long term.  

Cities like Austin, Dallas, and Houston are each taking different approaches, from subsidized housing to increasing zoning for multifamily developments.

Quote from @Yimma Davila-Castro: Hello,I am new, and I did the house hacking and got a few houses, but I am starting solo and would like to learn more to increase my house portfolio and improve my finances Welcome:  I started with a duplex and went owner occupied for a year. 

Also, you can ask your existing lenders to increase your credit limit-- usually they'll ask for your income and you can include your rental income.

@Jose QuinonesVA loans include advantages such as no down payment, lower interest rates, and increased cash flow potential for house buyers.

If that's your plan, I'd just say let the numbers influence the purchase more than emotions.