You then subtract what the estimated debt service would be - say $800.

And there will always be people who think that way just as there will always be people who cannot be bothered doing lawn and yard maintenance who will like to move into those types of units.And I know many of the buildings that you are talking about.  

I have seen that online with news services recently.

The weather can play havoc on your property in cold winter areas.You need to make sure the property has been winterized by having the heating,water heater,pipes,rain gutters,and the like are serviced for winter and fully inspected.Make sure you have a snow removal plan in place like the tenant has to do it or you pay someone to do it on a regular basis.

Tenants will be handling all maintenance.

If you are thinking of becoming a part time agent to work with folks buying at "retail" price, you need to understand that they need your service and attention.

Ideally though, you need to make sure the deferred maintenance is covered somehow so it doesn't bite you in the a$$ later. 

But I also noticed that appliance companies have services that can be called if there is an appliance needs to be repaired. instance, GE has a service where you call them and they arrange for a vendor to check out what is wrong and repair it.

It will be difficult with no money, no/inconsistent income, AND no experience ... you normally need at least 2 of those 3 ... perhaps you could work in RE services, like as a RE agent, for example, to earn while you learn and get yourself closer to getting 2, if not all 3 to invest with ...

I have a few new properties and am looking into buying more but want to know from people that have been doing this for 5, 10, 15,20 years how much on average they have spent on maintenance/capex each month or year.