@Guillaume Vidallet no matter what state you create an LLC in, all other states will require you to register any LLC that does business in their state.So, you buy a rental in Michigan and place in an LLC, you'll have to register that LLC in Michigan. 

can't even begin to understand where you are today, but you and your family understand, and that's all that matters! 

If there is "still contamination" at any level, I would be concerned about that and pass on the deal no matter what.

I get excited when new investors finally figure this out because their first deal then becomes a matter of when.

If this encroachment is truly a matter of inches is anything going to come of it?

No one will ever thank their landlord for doing them a favor- at some point, they'll have to pay market rents and you'll be the evil slumlord when that day comes, no matter how nice you've been up until that point. 

Both could be vacationers or business travelers or anything else.No matter what you quantify your STR is, you need to fully furnish it well, have plenty of amenities etc etc.

If it's a matter of a quarter point but the more expensive debt is with a bank that offers better other terms like amortization and LTV, and they have a rock star loan officer, I'd go with the slightly higher interest rate product.2.)

Reputation matters for your offers in the future and can be the difference between getting a deal and losing it, will either of these lenders help more with that over the other?

Finding a competent attorney to work with is a matter of interviewing several and picking one.