You said you had several years worth of returns...so multiply that few hundred dollars, and the price you got seems reasonable to me.In addition, you provided spreadsheets instead of some standard accounting format (QuickBooks, for example), which just adds to the time/complexity of the accountant's job.If he's good, he likely saved you more than what you paid him.Lastly, and I don't mean this to sound snarky, but you ended by saying that you might as well have done the taxes yourself -- if that was an option, why did you have several years of unfiled returns?

Multiply it's ARV by .75 and make sure you're under that with purchase price and rehab 

Take those numbers and multiply by the average commission in your area and it's a no brainer.Here are a few tips...1) make sure that your facebook profile has "Real Estate Agent" or the name of your company right under your profile picture (the About section). 2) Don't hesitate to bring it up in conversation when the opportunity presents itself when talking to friends, family co-workers...everybody loves to talk about real estate.

So take the mortgage credit report add the bills, plus primary, plus subject and multiply by 12 or 24 (depending on lender) and you need that much extra liquid cash in checking/savings to show.

Is this typical, and what would be an appropriate multiplier for forward revenue for commercial real estate of this kind?

When I'm calculating to determine if I want a property, my "quick and dirty" is to take the rent, multiply by 0.70, subtract PITI, and that's what I consider cash flow. 

If this were a simple fix-and-flip, you'd calculate Max Offer by multiplying ARV by 70% to get $140K.

The way I see it, the two ways to make it work are:1) short term hold (flip) - you build the storage units, get them rented and through that increase your NOI which in turn uses the MF multiplier to increase dramatically the value of the property.

If I multiply it by the square footage of my 2550 subject property that gives me an ARV of $283,000. 

From past multifamily I've looked at in California investors typically put weight to the gross rent multiplier and cap rate, as long as the fundamentals make sense.