Probably going to be a check.Smart contractors are starting to understand that convenience matters to customers and being able to take different methods of payment can help them collect their money.

If you wanted to fund a portion of the down payment would you suggest a hard money lender, personal loan, etc.?

You can get a HELOC if there is equity in the property most likely, which there should be since you own it in cash, but you will just be decreasing your pay out and then may end up short in repair money, depending on how much it is worth.

Do you have money set aside?

Take a bit of that money and invest in learning - go to meetups and the many events that take place related to investing in the city - some for free and some paid.

You can easily find this online but I will message you directly with some additional info. 

I was able to get a private loan which I used to purchase the house then I used my own money to rehab the house.

that is more a RV park. the MBH parks down here. we typically own the land, lot, and trailers. there is a reason but long story short, if i just own the lot and they dont pay the fee. i do not have the biggest teeth to push the need for my money. but if i own it all, my experience says it is a better path

Unless you're working with Private Money that is going to carry the risk of your lack of experience, banks want to see experience, Net Worth and liquidity after close to consider the terms.I started with single family, four plexes, and remodel flips for a lot of years before getting into larger deals. 

However, if all they offer is general info, I think you can find most of it yourself in Bigger Pockets and other online sources.