Same here. We have alternated between RiftCat VRidge and Virtual Desktop since the Quest came out, they have slightly different approaches so one may work better for you. VRidge is free to set up and try with a time limitation which can help you see if it is something you can get up and running with.
We never had success with ALVR, but I feel it is more due to the hardware we tried to run on than anything else. ALVR is completely free I believe, and it has been a good while since I tried it.