hope this is on topic ...
i,d go a bit further with the issue of home made blades ....i think you can actually compete very well with the commercial blades ...it,s a matter of personal choice i guess..
its pretty easy to "knock" up a constant pitch , constant chord ,no taper wood blade....that,ll work just fine
now... if you have extra time on your hands , (and your a bit nuts) you can use a blade calculator and make the non linear twist ,graduated chord , taper blade .....you can even feather the trailing edge to a razor point if you wish ....
...get a ultra smooth leading edge etc....
going after these traits might seem a bit extreame ....but the side effect often overlooked (i think) is that you get a stronger quieter blade .....
if you really want to get certified you can play with winglets at the blade tips ....and yes it has to be fun .....
the best part is your in controll of your own machine ....you can replace the parts , if you need too