She will be vacating her unit end of September, and now I need to find a replacement.

I'm currently looking to invest in a home as a short-term/vacation rental property.

I am of the opinion the trying to do vacation rentals is no longer the best way to monetize a property.

Unless you're wanting to get a high end multi family property (think estate with a carriage house or luxury building where you reside in the penthouse) or start a vacation rental or air bnb business, you're going to find that infrequent stay's there will be more hindrance than anything.Properties that make good primary residences do not always make good efficient rentals. 

When I checked some vacation rentals sites I saw lots of the homes were indeed booked.

I built about two dozen vacation rental houses.

I went back for a vacation and saw that they have a nice big beautiful road leading into it so traffic should be less obnoxious.

I bet in 10 years we could sell the place and come close to doubling our money plus have a great place to vacation in the meantime.

Within how many days do they need to vacate the home after receiving such a notice?

Hypothetically, lets say someone wanted to liquidate some of their portfolio to finance a vacation rental down payment and furnishings.Say he needed to raise 100K and had the following options:Sell mutual funds that have moderate long-term capital gains?