(If possible, please itemize this answer)For items such as vacancy, management fees, repairs, and maintenance, what percentages would I calculate?

Once you get further you need line item figures with dollar figures. 

However...I have an addendum that allows for the itemization by type, mfgr, model, serial number and current market value of each appliance I leave.

Not all school systems, property appreciation, etc...translate to better returns, just because they are low/high.Each type of resident, buyer or renter, evaluates many of these items and measures them in their decisions to "move in" based on where they fall in their priorities. 

The 70% formula is a bit out of date and really not specific enough when it comes down to it.I think you're better off itemizing each expense and formulating your offer off of that.

Also, utilize the MassSave program for any quick renovation upgrades (0% interest for 7 year loan on energy efficient household items).

When he asked for something to be done it was either the item was long past life or it was an item that could cause further expenses. 

I've never owned before so it is a learning curve, but the cash on cash return is so far phenomenal considering I just stop by every morning to check on the attendant, the store, and meet with customers.My plans are to give the whole place a facelift, set up a wash dry fold service, and provide some newer machines, all purchased with the revenue from the laundromat.Currently it grosses about 250k per year with a net of 80k.

They don't do well and they leave, they do real well and they want to move to bigger.6) There is a certain retail business (actual company) that builds its own store along with a strip mall and then sells that. 

I am guessing where the money is stored needs to be easily liquidated in short order and not at risk of dropping in value.