lots there David. a couple spontaneous, reflexive thoughts and prompts for you:
what's the going rent for your inventory? is it enough to cover the underlying debt service (if not, your f-i-l handed you a grenade)?
what phone number is on your sign? if your celly, you might expect odd-hour calls and lots of tire kicking.
If the neighborhood is decent, you may consider hanging a lockbox on the front door and giving it to prospects who pass the "sniff test" over the phone, asking them to call with feedback when they leave and ensure that they replaced the key in the lockbox.
What will you use for lease doc? If you presently have nothing, you'll likely find one online to serve the purpose, or perhaps Office Max, etc.
MOST IMPORTANTLY, do not sway from demanding full first month rent up front AND matching security deposit. This is your best screening tool. I've had many tenants pass the full, expensive research screening process only to default after a couple months, and I've had unscreened tenants pay reliably for years. it's a crapshoot, but CASH UP FRONT is the best risk mitigant. Don't let someone talk you into staggered SD payments or any compromise of this all-important standard.
Let me know if you have any particular, specific questions as you drive further into the process.
Peace,