Now if I pass that income as management fees to S-corp, I pay $3.5K (SE tax) + $800 (LLC fee) + $1700 (CPA + bookkeeping) = $6K in total.

On the other hand, I’m hesitant to simply pay down more of a property, as we don’t need the immediate cash flow.Fortunately, both my wife’s job and mine are recession-proof, which allows us to be a bit more aggressive with our investments.I’d really appreciate advice from investors who have experience with frequent moves or military service.

Will it pay the full PITI plus Capex, management fees, maintenance etc?

I have found that they worked really well when it comes to getting better tenants and better rents, and having less hassle, less headaches, and then getting a higher sales price; without paying closing costs or realtor fees.

Quote from @Paul Lucenti: Would you rather have monthly cash flow or would you prefer a quick pay day after 3-6 months?

It was held by the previous owner for a very long time, so I wouldn't be surprised if some basic facts about the house are incorrect.I was making an offer on a house a couple years ago and discovered that the owner was paying taxes on an additional house that was on the neighbors lot and didn't know it!

Example: If a business buys an oven and it costs $5,000, and $1,000 for installation and setup, and $200 of delivery and transport fee. 

However while people in Windsor doesn't have the luxury of high paying jobs that GTA residents have, is it just a temporary fever of buying houses, or there is really something going on in this city ? 

Insurance would cover it, I would pay the deductible, and no assets would be lost.If you are in an area like San Diego where people are more likely to sue, a judge is more likely to find you guilty, and the payout is expected to be higher, you may consider an umbrella insurance policy.

Make sure the tenants are paying market rent or above, otherwise your loan will be DSCR constrained.