Questioning whether we’re ready

Hello all,

My wife and I over the years have considered getting a puppy. We both love dogs and grew up with them: me with slightly older rescues and her family raised them from puppy age. We work from home and on average are away from home only a few times a week for a few hours.

We have been living in a foreign country for almost a decade, which is part of the reason we have delayed. We tend to like to visit family once a year or so and know that would complicate things. We also have to travel within the country a few times a year: but that may be changing which is why we are thinking about this a bit more seriously now. We also found a really nice option in town for a kennel for quick trips once they're older.

We've been researching Boston Terriers and reading up on caring for a puppy. My wife has some experience, but it's a bit new for me. We have been learning and planning, and have our name on a list for an upcoming litter, but it's low pressure.

Our landlords have a Chihuahua that is about 5 months old, and they had to go away for an emergency and we are watching him now. We thought it would be a nice way to kind of test the waters and see how much it would affect things. We realize that he's older, though.

Thing is… They literally dropped him off with a food bag, a toy, and a bed. No crate, which we expected and when we try to put him in a room to leave the house for a couple of hours he starts tearing apart the door so we've stayed home. Turns out he isn't really house trained like we thought and has peed in the house 6 times on the last 24hours despite us taking him out every 30 minutes, he's already taken out some fresh laundry, a couple of rugs. and fortunately the others were on tile. He bites a lot, which is expected, but my wife especially is starting to be pretty bruised and cut up. The diverting situation with his toy only helps a little, and yelping or giving him a little gentle nudge or restraining him for a second when he really bites doesn't seem to have an effect other than to make home bite harder.

I guess I would expect this from a new puppy, but expected things to be a bit better. I'm honestly pretty annoyed at this point. However, I think my annoyance might be more with his owners than with him: he's a baby. He's pretty much left alone outside on our buildings property all day. But it being a short period of time that we're watching him I don't feel like I can really improve the situation, and I wasn't expecting so much pee in the house from him, considering he's "house trained". The lack of a crate or a pen means one of us has to be on top of him constantly, and it's hard to give him an area to make him nap.

Anyways… I'm a little surprised that I'm more annoyed and exhausted than I expected. But I also feel like it could be different if it was actually a member of our family, and we were being consistent and trying to stick to more of a schedule, crate training, potty training, making sure he takes naps.

Is it a bad sign that we're finding this difficult?

Thank you for any advice or information you can provide!