I'm from Western Mass and the area you are looking at is no where near Western Mass. To answer your questions to evaluate a deal, this is what I use ...
Vacancy - 8% (this is about how much the bank will use in their numbers)
Repairs and Maintenance - 6-8%
Capex - 10%
The other items I would agree with Brandon, they are going to be marginal increase which the increased rent should take care of it.
I find that turnover is going to be your most expensive time as a landlord. That is when you need to replace carpeting, paint walls, replace lights or plumbing fixtures, replace doors and repair windows, etc. And your doing this all while you don't have income. You also have to carry the cost of utilities, outside maintenance, etc. for that month as well.
I would sock away at least 15% for turnover costs and if something major comes up (ie. replacing a furnace). For the maintenance, depending on the size of the building, you will probably pay for the expenses on an as needed basis so you wouldn't "save" the money in a special account. You do however have to account for it when your analyzing properties.
Hope this helped.
Tom