I had three dogs years ago, a male Rottie, Female Shepherd and a Female Pitt/Lab… all rescues. It was fine for me back then because there were three of us in the house and each of us claimed a dog (mine was the Shepherd, of course!) so everything was easier since it was pretty much like we owned one dog each.
I would LOVE to get another dog (I would never tell my boyfriend this…. Yet lol) but like you, I am the caregiver 80% of the time. With five cats and 2 dogs in a smallish house… even that gets too much for me. I know I would go insane lol. However… when we move to a bigger house next year, I will ask again for another dog… but a smaller one.
It’s all about how you feel. How do you feel now with two dogs? How would you feel with one more? Do you feel overwhelmed now? Or do you feel like you can give much more of yourself. I have a friend with 7 large poodles and she’s as happy as can be… if I had 7… I would go mental.
As for walking three dogs, when I had three dogs the smallest was 80lbs… I weighed at the time 115lbs. I walked all three dogs for about 7 years with no problems. They were all leash trained though, and I did walk them one at a time until they were fully trained. If there was a child, or loose dog, or any other problem all three of my dogs would sit on command until the owner or parent would fix the situation. My dogs were amazing with that. I have two dogs now, I would not walk together. They weigh more than me together and my puppy is not even close to being leash trained. When she is fully trained I will walk them together, not before that.