I spent a great portion of my life in school and as such lost out on a lot of financial/investment opportunities since I was in school or in low paying jobs in order to gain experience.  

I wouldn't use a number that low for a 3/2 house much less a 10 unit building.How about 3k-6k per door as an estimate then adjust from there after more due diligence.

I have yet to see anything put out by those 3 gurus that is current with the new requirements of seller financing or options, so you can take much of those old ploys in their material and heat hot dogs in a bond fire!

First, i would not furnish the places, it will probably get trashed, let them get there own furnishings and make sure that the lease says they must remove them from the property when they leave. i would have them pay for utilities, to an extent - have them pay for electric, supply the heat but give them an allowance for certain amount of months ( especially if you have older furnaces and they run on oil heat ) if they go over then you charge them for it. i converted mine to gas with new furnaces, i include heat in mine, but i control the thermostat ( online, thermostat is locked at the house ). i also provide water / sewer and free internet.

I would think you would only do calculations based on what you plan to do to the house, but I am curious what others thinkI haven't had to worry about this yet, because my properties thus far are relatively low end homes.

Great insight as I'm licensed and deal with low priced homes with high cash flow.

Eg they borrow at 4% and receive say 7% giving them a profit of 3% for no money down but a little time for the loan app plus the risk associated with repaying the loan if it goes belly up - though with 20% of my cash down the risk is low for them.  

Presumably, your Airbnb rates would need to be a pro-rata daily rate based on the prior rent, which would probably be too low to be worthwhile for a periodic rental.  

Probably used him 3-4 times, and this was a referral. 1 closing we had, he didn't catch the tax rate was too low, and we had to pay the city out of pocket.

Those yearly expenses seem low.