Went out today to get another Gardena retractable hose reel and got a nice surprise where our local Bunnings at Loganholme QLD nearly halved the price for these 15m units. This local deal is the version that you can just drill into your lawn or garden bed and then connect one end to your tap. Avoids drilling into your house or patio. I cannot find those on the Bunnings website anymore, so apologies that I didn't post a link. Can also post receipt if someone needs it.
Product description: https://www.gardena.com/au/products/watering/hose-reel/roll-…
Good price, Good find OP