How much to charge on fixing whole bathroom?
Do some armchair shopping on the internet to find out the costs
on bathroom fixtures. Price toilets, sinks, bathtubs, tiles,
flooring, plumbing needs, light fixtures, paint - basically
everything you will need. Then try to figure out how many hours
your project might consume, then add 40% more time for those little
surprises that nobody counts on happening. Figure out how many
hours you think the project will take, then add another 50% more
time to that, then multiply that by what you think your fair wage,
and what others would be willing to pay, should be. Then add
another 30% to that. Add it all up together and summarize, and if
you think it's reasonable, then go for it.