I was even thinking about a small $50 amazon/gift card for both of them?

A nice gift from parents for newly weds with a new house is an extra house pmt principal only.   

You can get in with 3.5% down payment and all of that can be a gift and the seller can contribute 6% toward your closing costs, so in theory, you can get in with no money out of pocket. 

Here's the situation:- I found a good investment property (lake front, small cottage) for short term rentals - $350,000 offer was accepted - My partner has the 25% down payment, most of which is gift money from a property his mother recently sold - Neither of us can get a conventional financing loan right now (need to file 2022 taxes first) - We found a non-bank lender that doesn't ask for tax returns, but they do look at bank statements and will see that the money is a gift, and because they only loan for investment properties, gifts are now allowed - So, we're looking for a new lender... any ideas? 

Home Warranty (far from perfect, many people don't like them for a lot of reasons mainly because they are a pain to deal with, but as a safety net for someone looking to get going despite not having super deep pockets yet, they are worth looking into IMO, just pick a company with a good track record, and often you can have your agent pay for it as a closing gift). 

.- Gift from family member as a deposit, and payback when the home salesThe question is really broad, so if I have misunderstood you question please let me know.

It's the gift that keeps giving.

Ideally, I would have liked to set up a LLC, but that doesn't seem reasonable when considering the fee associated with it.I am not sure about your state, but there are often exemption for title change when it is a free transaction (gift) or if the final beneficial owner doesn't change.

The second guest, he got a gift certificate for a free meal at our local restaurant. 

@Jordan Akins Talk to your accountant or @Basit Siddiqi above, about your dad 'gifting' the property to you and the associated tax savings with that transaction.