Is IVF worth a try for unexplained?

MW

My husband and I have been TTC for almost 3 years now with not one BFP. We have been through all the testing and everything looks perfect. We did 4 medicated IUI's with no luck.

The issue is we live in a province in Canada that offers zero coverage for IVF so we could only give it one try and even that will be very challenging financially. So for anyone with experience do you think it's worth a shot if you know if it fails there is no option for a second try?