Getting from the Buffalo airport to Niagara Falls, ON

What is the best & most cost effective way to get from the Buffalo airport to the Canadian side of Niagara Falls? From what I've seen, there isn't a guarantee that an uber driver will go through customs & take us into Canada. I have also seen the option of taking an uber to the rainbow bridge & walking across into Canada, then having a Canadian uber take us to our Airbnb. The cost is around $40 to get from the airport to the Border and then another $12 or so to get to where we're staying. The other option was to reserve a taxi from Buffalo for about $75. 

Are there any other options? I'm trying to find the most cost effective and also the most hassle-free way to get me, my husband & our luggage from Buffalo to our Airbnb. Thanks!