So working with your buyer to negotiate as much value as possible to the real estate and least possible to the business will help to lower your taxes further.

If you are concerned it will be too hard to find a renter, lower the price and rent it for three months, then place a new tenant at the higher rate after winter.

Refinance offers a lower rate, longer term and a lower payment.

I don't know your specific market all that well but have you done some analysis on your ADR during the high season X your high season occupancy rate and determined whether taking lower priced slow season bookings vs letting your property stay vacant during the winter averages out in your favor?

.- get into real estate with a lower rate and lesser percentage down payment.

On the other hand, you stated that the management firm was charging 15% and had a 15k expense. 

In my market there is only so much you can charge for a house.

In my area they are charging $200 for inspections and $50 for cleaning.

Are costs really lower with a container? 

Getting it under market value would be a bonus.So, would using an FHA 203k renovation loan, which would allow me to buy something unqualified for a standard mortgage, which would weed out a lot of competition and push the price lower.