Since I started in 'wild bee real estate' a few years ago I add every year a few more bee homes in my garden. Just because it is fun to do. And my garden/flower - vegetable pollination is getting better by the year. The last 'residents' which moved into my bee homes - besides all different kind of mason bees - were Leaf cutter bees.
Don't waste your time with industrial honey bees - wild bees are way more efficient with pollinating AND they don't sting!!
Here a link I found from SFU which I believe has a nice overview about our wild bees.
https://www.sfu.ca/people/eelle/bee_info.html
If you need help with 'bee home building' just contact me. Contact info >> see Thetis phone book
Matthias