I have a dog. It is a great responsibility, both with time and money, and will ofc have influence what time/money you have - or not - for other things. If i go away - petsitting or other - I need to have someone look after my dog. It is usually family or a kennel now - might be petsitters in the future. For a few petsits a year it isn’t any different than going away for work or holiday, lile most do.
I would say, however, that the work and time you put in with your pup the first year you get back tenfold during the whole life of the dog. So should one decide to get a puppy, prioritize being with and training your pup the first year. It really pays off. And most dog-related problems would often stem from not doing so.
My dog is a senior, and as it seems I will be petsitting going forward I don’t think I will have a new one. One could ofc get a similar experience petsitting on repeat sits, locally or other. Many hosts would prefer a repeat sit.