QI fees will vary, and finding one that will do a reverse exchange will vary also. 

While this is municipality dependent, if the contractor is not licensed you likely cannot obtain the necessary permits and approvals.

It really depends on your goals, time availability, and risk tolerance.

Quote from @Na Wilson: I have a source (depending on credit score) that can do a 90% LTV DSCR loan on non-owner occupied real estate. 

In my area, U&O inspections are done on every sale and varying rentals from annual to just on turnover.

Providing relocation assistance to tenants, for example, if I want to sell the property or move back in - this can range from one month's rent to thousands of dollars (e.g tenant has a disability, minor children, elderly it will cost you more), depending on the city.

If everything in the neighborhood is 90 DOM (market dependent)..

The payment is fixed and not dependent on the balance owing - the payment always stays the same unless the interest rate adjusts.

That depends - if its a short term hard money loan possibly, but expect to pay more for it.I would first ask your current lender if you can extend the loan.

They have different tiers depending on what type of training and resources you're looking for.