There is a treasure trove of information right here on BiggerPockets, Stanley, that I'm sure addresses triplex and duplex investing. 

The only thing I can offer to a new investor is this:First, BP is a treasure trove of information for new investors.

I changed all my windows (7) to brand new thermal windows for $2500 then I did brand new luxury vinyl siding with insulation board and nice metal skirting for $7000 I also got a brand new steel roof with more insulation board for $3600.

One man's trash is another man's treasure.

remember the old saying prohabber, "one mans junk is another mans treasure".

Appraisal reports don't have sub cats girlies under SFR, i.e. stud framed, brick built, metal studs, modular, etc. it's just a SFR to an appraiser.

You should be able to determine if the area has central water; go to the neighbors and determine if the area has central water, if all the houses are connected and who the supplier is, then contact the supplier and see if they service that address; walk the property and see if there is a well head; determine if the area has septic systems or central sewer; if septic system the well should be at least 100 ft. from drain field; there are water sampling labs that will test the water; I would have a full test run including heavy metals.

That is the true treasure on this site.

On a different note, some electric meters in Louisville have metal tags on them in certain parts of town.I'm wondering what the reason for this is.

Well met all,I would like to introduce myself to the Washington DC and Maryland Communities.