My parents struggled really hard (and still do) financially so my sister and I are trying to really break out of that mold as adults. 

Living rent free (again not assuming that is your situation, but guessing many parents with adult children at home don't charge them rent), it can be easy to spend that money and then when you are on your own, having problems budgeting.

I recommend talking with your lender PRIOR to making the offer if you're relying heavily on this financing plan. 

I rely on the Fair Market rents on the HUD website, www.HUDuser.org and my rents are almost always above the median rents on that site. 

For example, I mention that every adult must pay a $30 application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.

For those who are new investors and rely on these forums for guidance there's a few things that jump out and should be clarified:1.

Rely on industry acknowledged experts for advice.

Happily take the appreciation if it happens but don't want to rely on it too much.

Your lender will probably require a certain amount of cash reserves so it would be wise also to look into lenders who might lend to you -- and get to know their requirements.Ultimately your expansion ability is going to hinge on your ability to borrow money, which to a part relies on how much down payment you can get.Just my 2 cents.

I have tried asking guests to invite every adult staying into the Airbnb booking.