Could you please suggest how I can start and what steps I should take?

I am not sure about the other markets but I would suggest looking up a Realtor from here and utilizing their knowledge to help you. 

In addition, the company that they recommend we work with, Prime, helped me set up my companies and though I repeatedly asked them if there were any differences in how it was set up because I was a Canadian, I was told that the way they suggested I do it was the right way.

Many Realtors will suggest purchasing a property using a FHA Loan, to reduce your out of pocket money.

The heck with all these suggestions.

Not sure if the upstairs tenant (heavyset person with a dog) plays a role.Seeking suggestions.

I would prefer to sell the property vacant or the easiest less stressful way as possible, however I was advised that could deter investors buyers interest as the rental income is a one of my strong selling points.I am open and would appreciate any thoughts and/or suggestions from fellow agents or investors alike.Thanks in advance;)

Any suggestions?

.$140k offer8% interest rate20% down8% management fee5% vacancy5% maintenance 5% cap exI haven't gotten insurance costs yet but it's been suggested that I plan for $2k per year. 

I suggest focusing on building your "Core 4" team—agent, lender (one who can finance both the purchase/rehab and refinance is ideal), contractor, and property manager.