When letting the tenants know I'll be showing the property (hopefully once) will that notice have to come from seller or me since I'll now have the contract (as it's in 30-45 day escrow?)

Here in Canada, both commercial and residential mortgage have terms less than 10yrs ... the most common being 5-years, so "balloons" and renewals are the norm.As Omar indicated your primary concern should be running your business as efficiently as you can and maximizing the revenue stream.    

We posted the notice on the front door (and took a picture of it) the following Monday.

Just noticed I never took a moment to introduce myself.

I just want to know how to structure a deal and what issues I may run into with the title of the house.Question 2: It appears that this lady got served a foreclosure notice, so I'm guessing she is a few payments behind.

With investment property its very common for the investors to give power of attorney and we conduct the closing ourselves. 

However, if the vendor is still personally on title as a tenant-in-common, there may not be a mortgage registered ... in which case, a conventional lender may not see the property at all ... or will simply see a property you own jointly with a another party.That said, you will still be signing an agreement with the conventional lender in which you state that you have disclosed all such debt obligations :-)

I then make a mailing list and send it to all those same people that will be getting notices from the city.

If they are month-to-month, send them written notice of new rent and start date in accordance with local law.Need help?

Eitherparty may cancel this agreement on its anniversary date by giving the other written notice toterminate this agreement at least 60 days prior to each said anniversary date.