Hello
2 years ago I had similar problems like you. I did consider changing out the bathtub since the corrosion was bad and water was sipping thru the tub. Initially I was thinking to renovate the toilet and change it to a shower screen.
After I go quotations, I needed to spend about $2.5K which is very expensive and the job will take about a week and I have to live with dust and dirt in the master bed room. With a new shower screen I may also need to do extra water proofing if I needed to hack the existing tiles…..so may issues.
My friend recommended a guy to me and I decided to get the bathtub replied. The guy came and got my tub repaired and I saved thousands and did not have to put up with the mess and dust. I paid him about $350 for the job.
Below are the before and after pictures:
Before
Before
After