100 bird houses

Every spring I make one goal that is unusual and normally over looked and never gets done, this year I chose to make a pile of bird houses to attract beneficial bird species that will hopefully lay havoc on the insect population. All of the wood used was reclaimed from either pallets or shipping crates so my only cost was a tub of screws used. They are all going up in locations on my property that suit each of the species. Do you think with this many additional birds there will be any noticeable difference made? What are your thoughts on putting this many houses on one 10 acre property?
(The purple martin barn is still in the process of having white trim installed)

There are houses for:
26 x blue birds/ tree swallows
17 x wrens/ chickadee
16 cavity purple martin house
50 shelves for barn swallows
1, 4 cavity bat box.

I hope it does because I have purchased 45 boxes to install for the same reason.