As a rough estimate of value you can add up these rents and multiply by 10.

If you want a "quick and dirty" analysis then just take the total monthly rent ($900) and multiply by 100 ($90K).

Now with commercial, comparable sales factor into the income approach anyway, with the Gross Rent Multiplier (GRM) used for the income approach coming from comps, so I think those two methods are rather redundant most of the time with a commercial appraisal.

If the past is prologue, by funding a Homeowners Refinance Act, similar to the one used during the Great Depression, we could multiply the effectiveness of the current Bailout Plan.

That % can then be multiplied by your annual utilities, security system, mortgage payment, insurance, and property taxes as expenses that can be charged to the business.There are some neuances that have to be observed when doing this so check with your tax professional. 2008 is the first business year that I am going to charge these expeneses after hearing about it from my tax professional early last year.

A 1000% gain multiplies your money by a factor of 10 so your $50,000 becomes $500,000.If your money grows from $50,000 to $500,000 in 30 years you have made about 8% per year compounded.Yes, a 3% increase in rent income can result in a greater than 3% increase in your cash flow.

Multiply that times 75%=$337.5k Take your repair costs. 40k and closing costs(normally holding costs utilities, taxes, insurance, etc. 10k=$50k. max offer is $337.5-$50k=$287.5K.

Vacancy cost is equal to market value multiplied by months on market. meaning if you market your property at $1500 and it sits for two months, you have lost $3000 in vacancy.

A detailed shopping list is your friend to avoid multiply trips to the store. 

Then assume 90 percent is collected and multiply by 0.9.