Had issues attaching the photo... Reverted to my mobile

My uncle once had a man cave and he said that the comfortable chair was the best part while he watched the races. Classic.

my very basic suggestions include losing the external front steps and have a front porch with front door and entry foyer downstairs and access to under the house from the garage and have a simpler staircase (NB there's a lot of furniture and groceries and rubbish that have to go up and down stairs so all the stairs should be more comfortable and direct) with square landings and no angled steps original upstairs entry area could now be used as an office but you need to add furniture to the family dining area and alfresco to find the best use of floor space and doors, the powder room needs to be more private so i would lose the extra ensuite upstairs and make the rumpus room into a multi purpose space with sliding doors and ens upstairs has more than enough space for generous hallways, bigger bedrooms, more storage, a shared family bathroom, a living area and/or office and grouping the ens and wiw (with twice as much storage and dressing area) on the south west allows better access to the views from the toilet shower and master bedroom

And the $750K is an estimate; the builder has a team of six, they do their own concreting etc. He works on a cost + basis, he estimated $670K + unknowns (which he says can be $50-$100K). Priced in was $25K kitchen, $8K for walk-in, new cladding, change existing tile to colorbond, slight reconfig with existing house. He recently did a house a few doors up and we've been through it twice (nice neighbours) and are impressed with his work, and very easy to deal with. Here's the photos if you are interested. Built in 1955 for a local timber mill manager, less than 500m walk to town and beach. https://www.realestate.com.au/property/7-chapman-st-port-macquarie-nsw-2444