That's great that you groom yourself. But only once a month? Bwa-ha-ha-ha-ha...😜😆I have a tub but for my mini I actually specifically got a battery operated shower head because it's very easy that way. I could see doing the same for a spoo. I groom myself and do full body once a month but I do weekly touch ups. So even if I used a groomer I would still want most of the supplies.
On a more serious note, I too love Sue Zecco. She and her videos are awesome!
I think you've already gotten lots of good advice from spoo owners. I have wee toy poodles and wash them in my laundry tub...have a faucet that is a sprayer just like the one in my kitchen. They're easy peezy. I would think though, if you have a sprayer hose in your shower, that would work well to wash, towel off, let your dog shake, towel dry some more, then over to where you have your doggie dryer and so on. With a walk-in shower, you won't have to lift your dog. The elevated tub might work out great if your dog will get in without you having to lift. Good luck. It is a challenge but kind of nice to be able to do this ourselves....it's not only good for saving money, but a good bonding time too.