Once I buy one of these units I’ll keep you updated on how well the property Managment handles everything.

Both the seller and his agent know that the rents are ridiculously low and im positive all the tenants are expecting rent increases, I think increasing by $10/week every couple of months will ease the pain for them, I dont mind covering some of the mortgage for the first 6 months or so, even if the tenants decide they want to move, they will start looking at current rental rates in the area and they will be sadly disappointed and will most likely end up staying anyway especially if i entice them with updates on their units like newer flooring and appliances because some of the stuff is out dated. 

I am worried if I buy, the property will sit vacant for long periods of time.

But updating electric in a 100 year old house? 

I have found a few properties that I am interested in but they need some updating.

Period.

I'm an agent who's been heavily investigating that particular market for a foreign investor recently and I'm leaning towards either new construction or picking up a unit (townhomes) that is already updated.

You can sue for any "hold over" time period or deduct it from their security deposit like any other charge.  

Calling them out after the inspection period means you have to get back into the place.

yes, here is a copy Corporate Form Type Form 100, 100S, 100W, or 100X Payment Type Bill Payment Period Beginning Date 01/01/2018 Period Ending Date 12/31/2018 Payment Amount $800.00 Payment Date 03/13/2018