Put on the roof cross bars, and two fork-mount bike carriers.
You end up with 3 different keys. Stow a bike key inside the locking cross bar endcap with a 2" dia key ring hoop so it can't fall in. Do it on each side. Now you need just one key to access everything.
Most people will need a short step stool to mount and dismount the bikes, AND DO NOT drive into your garage or other low structure with bikes mounted. Not a perfect solution, but the cross bars can be used to carry other items up to 154lb.
If you have any questions, feel free post in here and I can answer them. It it tool-less once installed EXCEPT you must use the included allen torque tool to remove or install the racks themselves. The racking locks against theft, but not necessarily the bicycle unless you grip the forks hard enough so nobody can pry it out. You can either throw the front tires in the back, or there are folding front tire holders if you need the room.