Your post isn't really clear:(The property is in your name 100% or your name and the LLC?

Have seen many times someone say they will take the unit but never sign the lease or sign the lease and not pay deposit - also the "pay deposit day move in" does not work - need it to secure the property for them.

Buy your properties with that in mind, steeply below current prices. 

Hard money lenders don’t care as much about the condition of the property; they care more about the deal making sense (like how much it's worth after repairs).Then, once you fix it up, you can refinance it into a conventional loan — that's called a "cash-out refinance" or just a "refi to permanent financing."

I had a real estate discussion with a family member (at a funeral, from all possible occasions) who is well into his retirement age and is still pinching pennies and living very frugally because they use every dollar they can spare to pay off his rental properties and he is almost there.

Once we purchase an investment property it will go into an LLC 

If you want to grow and keep what you build in your portfolio, these considerations are essential.With a small portfolio when you can handle less risk of loss, separating each property owned into an LLC to limit your personal liability and isolate one property from another is a good way to go.

If your in-laws sell you the property through owner financing, they may be able to report the gain using the installment sale method under IRC §453, which spreads the capital gains tax over the life of the loan instead of paying it all upfront.

Overall the property seems in good shape and no major issues that is known or seen.

., you can’t legally close on a property without a notary.