If you're asking this question, you really have no business changing CFWs on the 3DS.
The answers for your questions:
1. Yes, you can have cfw solutions.
2. Yes, you can have CTR Boot Manager or any other solution you would prefer to accomplish this for you.
Also, I'd stick with luma if I were in your position. I can't fathom what reason you have for wanting to waste your limited storage space with a bunch of things that all achieve the same end goal at this point, but I certainly don't care to try and stop you. Have fun.