HI Emily Carpeting bedrooms is only dictated by your budget. The only variable is the price of the carpet, all other costs (installation, smoothedge, underlay) will be the same no matter what you choose. When you say remove wooden floors....do you know what is already installed? If you are only wanting to take the wood from the bedrooms but leave it in hallways etc, then the cost to remove wood planks (laminate?) may be around $20 per m2... A lot depends on how the timber was installed, so I think it's best to get in a professional and get a free quote. Good luck.

make a path to back yard using maybe crushed gravel. Then place a unique used window or door where you want it to connect to a fence or don't build a fence at all & mount the window or door as stand-alone divider from front & back yard.

Within Homestar, it's required to have a minimum floor insulation of at least R 1.5. Even if you're not going for Homestar, this is a good idea because 80% of the heat loss from the floor occurs around the edges. But how do you do it in a robust, unobtrusive and effective manner?

I store mine in the fruit bowl AND the fridge. Double whammy!