Thank you all for the invaluable advice.
I have also talked with a local investor. When analyzing properties, he does not consider CAPEX at all, does not allow for vacancy at all and estimates repairs at $450 per door (vs 5% of rent). On the other hand I always put CAPEX ($183 or 8% of rent, whatever is higher) and allow at least for 5% vacancy and 5% repairs.
The rationale for not including CAPEX in analysis is that by the time you'll need to replace the roof, flooring, plumbing, etc, you would have most likely sold the house. I do not quite understand this logic. If water heater breaks down, it will need to be replaced? If sewage pump breaks down, it will need to be replaced? One can not really control these expenses and if a landlord allows for too much deferred maintenance to accumulate, this will definitely impact the resale value of the house?
I live in a mid-size Midwestern town. I have not researched other markets for investment properties, besides the town I live in. Could major metro areas such as Chicago and Minneapolis/St Paul offer better returns?