Of course I’ll treat the tenants great and fairly, but it still has me nervous.

If its a freakin pig pen, then you can expect that they'll likely treat your property the same.

Many sewer services have cameras that can show you the problem and what type of system you have.Assuming you are on City sewer, after you have the lines cleared, treat the plumbing with an acid treatment--I use CLEAN SHOT--4x per year. 

Yup, it'll be treated as self employment and you will have to hand-hold your HR department in Canada since they don't normally fill out US mortgage paperwork.

I’m not familiar with reverse mortgages so should I treat this like a lien or loan and also would you move forward with this property?

I personally agree with you. ( but consult your CPA) Before getting into the detail, you might not able to take 20% Qualified business income ( 20% passthrough deduction) if you do not treat this as the profit sharing.

I would treat it as if your adding an authorized user to your personal credit card.

LLCs (and LLPs) can be problematic entities for Canadians when dealing with the CRA if they are set-up as pass-through entities ... if they are being treated as a body corporate for taxation purposes, there will be less conflict with the Canadian tax authorities.I can't speak for Platinum as I've never worked with them, but I've worked with several others and brought through them.

However, to make real money, you need to treat your first job like you are in training to start your own business. 

We should not treat it as additional rent.