I am researching Des Moines metro area to make investments (buy and hold)  in SFR.While researching the area, I am trying to find more about population growth, job growth, median home price, median household income, new constructions in the area, ...

Electricians can "fish" wires through walls and set up for you new electrical panels for each unit.No need to displace the four households.

If you are considering a condo to invest in find out if that condominium complex is "warrantable". 

https://www.har.com/content/newsroom/Houston Real Estate Highlights in October Single-family home sales increased 4.7 percent year-over-year, with 6,716 units sold;Days on Market (DOM) for single-family homes was 57 versus 61 a year earlier;Total property sales rose 6.0 percent, with 8,127 units sold;Total dollar volume jumped 9.3 percent to $2.3 billion;The single-family home median price climbed 3.6 percent to $234,653, an October high;The single-family home average price also achieved an October record, rising 3.5 percent to $294,500;Single-family homes months of inventory reached a 3.9-months supply, up fractionally from 3.7 months last October, but below the national supply of 4.4 months reported by NAR;Townhome/condominium sales dropped 2.9 percent, with the average price up 4.9 percent to $206,838 and the median price down 2.2 percent at $152,900;Leases of single-family homes rose 7.3 percent with the average rent down 1.1 percent to $1,754;Volume of townhome/condominium leases fell 6.8 percent with the average rent up 1.2 percent to $1,550.

They are charges paid to the Homeowners Association by the owners of the individual units in a condominium or planned unit development (PUD) and are generally used to maintain the property and common areas.

So, while the meth complicates is a little, it doesn't change much because if there is any smoke damage it needs to be remediated regardless of whether it was meth or just household items burning.

Single-family home sales fell 5.8 percent year-over-year, with 6,548 units sold;Days on Market (DOM) for single-family homes was 52 days;Total property sales declined 4.4 percent, with 7,842 units sold;Total dollar volume was down 3.5 percent to $2.2 billion;The single-family home median price edged up 0.2 percent to $232,500, a September high;The single-family home average price also achieved a September record, rising 1.7 percent to $295,765;Single-family homes months of inventory was at a 4.0-months supply, up fractionally from 3.9 months last September and slightly below the national supply of 4.3 months reported by NAR;Townhome/condominium sales fell 6.1 percent, with the average price down 6.6 percent to $191,967 and the median price unchanged at $159,450;Leases of single-family homes dropped 35.4 percent with the average rent down 4.0 percent to $1,812;Volume of townhome/condominium leases plunged 44.5 percent with the average rent down 1.0 percent to $1,584.https://www.har.com/content/newsroom?

. 🙄 I feel they are pretty standard for the market:Applicant must have current photo identification and a valid social security number.Applicant's monthly household income must exceed three times the rent. 

That's why 95% of millionaire households in the USA, according the IRS, are either headed up by a married couple or a widow/widower.

Her household makes more, has more history, more stable, and also-- I love older people.