Hi
@fishtales and welcome to the forum.
I lurked on this forum for quite some time before joining, and although I found out about fishless cycling before buying any fish, I still fell foul of taking advice when buying my first fish - one of which is still with me and is currently potting around my 5ft river tank, much better for a zebra danio than the tiny tank I had cycled.
Sailfin plecos are beautiful fish. I wanted to get one a couple of years ago, but didn't have enough room for a suitable tank, so I hope that you will be posting pics of yours so I can admire it. I think it's great that you are prepared to do whatever is necessary to keep your pleco happy and healthy, and that your other fish will benefit too.
I'm looking forward to hearing more about your tanks, and seeing lots of pics.