Renting to adult child + roomies

I'm looking at buying an investment SFH property in our town with the primary goal being to have a safe, decent place to offer to one of our young adult children (not legally a dependent.) I'm curious if anyone has experience doing this and any tips on best ways to structure the ownership/rental of the property for tax purposes. I don't need/want advice on the family/personal dynamics.

My goal is to have a decent home to offer this "child." Spouse & I will retain ownership; joint ownership with Child isn't an option. Can't be our second home as it's too close to our primary residence. Would be an "investment property" in so far as lender/legal (and we'll put it in its own LLC.

For the time-being (possibly permanently), our child won't be paying any rent (no significant income.) They would likely have 1 or 2 roommates who WOULD be paying rent to us. Our child may do some chores caring for / managing the property. 

Any legal/financial/strategic tips or things we should explore in how to best structure this plan to minimize our taxes now (very high brackets) and/or long-term (cap gains, etc.)?

Thanks!