tow hitch

I'm looking for a trailer hitch for my 2018 CX-9. My main goal is to attach a bike rack that can carry 4 bikes. But, if there isn't much of a price difference, I'd like to buy one strong enough to take a U-Haul trailer. Any suggestions on make/model of trailer hitch? Whom should I hire to...

Has anyone purchased and installed a trailer hitch on a 2017 CX-5? Is it a simple DIY project, or is it better to have the dealership install it? Any recommendations on a good third party hitch? I don't need the wiring, i'll only be using it to attach a bike rack.