Bidet seat help in Toronto

My parents are getting older, and my mom had hip surgery last year, so reaching and twisting have become really hard for her. My dad mentioned that a bidet seat would make things much easier for both of them, especially the kind with a remote control so she does not have to turn around. I bought one for them as a gift, thinking I could just install it myself over a weekend. I watched some tutorials and it looked simple. But when I got to their house in North York and actually looked at their old toilet, the shut off valve was crusted with mineral deposits and would not budge. I tried lightly with some pliers and now I am afraid I might break it completely. Their bathroom is on the second floor and the last thing I want is a water leak damaging the ceiling below. So I gave up and decided to call a professional. Has anyone in Toronto hired a plumber or handyman just to install a bidet seat on an older toilet with a stuck valve, and what is a reasonable price to pay for something like this including maybe replacing that old valve if needed?

My aunt had an old toilet with a shut off valve that looked like it came from the stone age. I tried turning it myself and it would not budge. I was scared of snapping it and flooding her whole bathroom. So I called a company that does sprayer bidet installation Toronto. The plumber came over, swapped out that rusty valve first, then put in the bidet seat and the remote. Took him about an hour. No leaks, no mess, and he cleaned everything up. My aunt is super happy with it and I did not have to stress about causing a disaster. Old plumbing is just not worth the risk. Better to just call someone.