Do you re-glaze bathtubs or replace them? 20 Years Old?

[Layne T.]

I've got a 3/2 rental which is about 20 years old, where each bathtub has a crack (see above) on the base of the tub. Questions for those who have gone through this:

1 - Is this deep enough where I have to worry about potential water damage to floorboards?

2 - Is a $500 re-glazing job worth it vs. a full $2k replacement job?  How long do you think each is good for?

I don't want to waste money either way, if the re-glazing can last 10 years great, with the cracks it only has a one year warranty though unfortunately. What have you all done in this situation?

Thank you!