The 2-3% rule would include the cost of professional management in its equation.

Like vacancy, repairs, management which when everything is running smoothly equates to around 600-700, as a begginer property I would reccommend an older purpose built duplex or triplex.

(FYI- I'm a scientist- I understand equations.) 

I do have a suggestion for a roofing contractor if you would like it.If the electrical has not been updated, it is likely that the main service is 100 amp, which equates to a maximum of 60 amps per unit. 

Could you expand more on the dba side of the equation. 

We hear all of the time about how much someone made on a flip or cash flow on their properties but never factor in time into the equation.

He never seems to forget about the smallest details that most starting, and maybe even some experienced, investors may leave out of the equation.

Experience, cash flow, DTI, appraised value all feed into the equation but value and LTV are of most concern. 

Through my education about real estate I would love to learn a little bit more about the deal.CONSIDERATIONS: Things I would heavily consider is how you will get the people in to rent the property, being away for so long I hope you have built property management into the expenses equation as BP always points out.

For a STR is there a target % of purchase price that generally equates to a successful STR property?