Four years ago I redid our bathroom myself. The previous version was done by a Bathroom company and it leaked all over the place after 2 years. We bought the house after it had been in 6 months. It was the best room in the house til then.
I got some quotes all around $30K

Could not believe it so I did the whole thing myself. Employed a plumber to do the pipes etc, left the electricals exactly where they were. Cost a bit over $5K instead. But and it's a big but it took 6 months of non stop go at it, working at night has it's advantages, as I had lot's of day time to devote to it.
Pretty straight forward really. A bit of make it up as I go along and a few plans.
Four years on it still looks the same doesn't leak and I 'saved' $25K.
Get a wrecking bar and get to it….think of the scope you can get with the money saved!
And whatever you do don't buy anything from Reece….what a rip off one stop shop. Only went there as a mum from the kids school worked there. Paid $2500 for a 'nice' basin vanity that had old style draw runners. Can get the same thing pretty much for a third of the price by shopping around.
It did help that I've renovated two houses doing most of the work myself.
Matt