Which is actually a bad idea as unfixed repairs multiply over time (especially water damage). 

Of the three Approaches to Value, if there are no exact comps with two houses on one  lot, as an Appraiser, I would probably give most weight to Income Approach; both the Gross Rent Multiplier and Direct Capitalization-hope this helps.

The 3rd column is used for expenses I might add later, or to add up expenses that will be multiplied (the identical bedrooms). 

So multiply the ARV (After Repaired Value) times 75%. 

Therefore the appraisal form, which is set by the Banks/Lenders are different than commercial property's, which typically place more weight on the income approach.The small residential income property appraisal report, address comparable rental data and breaks things down into items like value per bedrooms, value per gross building area, value per unit and gross rent multiplier, etc.

The electricity and water required to do a load of laundry multiplied by the number of Tenants per week will add up very quickly.

I make three times what the rent is.Me.....Thats not what I asked you....I asked you what is your gross monthly income before taxes.Her .....About $1,400Me.....Ma’am the rent is $595/mo and if you multiply that by three that means we want your gross monthly income before taxes to be about $1800 not $1400.Her.....Look, I’m at work right now why are you asking me all these questions like this...I don’t be trying to discuss this kind of stuff while I’m at work...dang!

This just underscores the fact that giving someone cash doesn't ensure they have money management or money multiplying skills.

@Corey Hassan I can't speak for all of SC, but here in Horry County (home of Myrtle Beach and North Myrtle Beach) a quick way to estimate your annual property tax bill on a second home or investment property is to take the purchase price and multiply by .0133. 

They were listed as an operating STR with furnishings included and seemed to be based on a multiplier of past revenue.