@LMSC, for the lawn, one thing you can do is not use a grass box, i.e. leave the clippings on the lawn. It then turns into nutrient for the grass. Saves taking time and effort to remove the nutrients the grass has grown, and then spend more time and money adding nutrient back. Also, you shouldn’t really need to water grass, unless it’s newly planted. Yes it will go yellow and stop growing if it gets very dry, but it will spring back. Save the water.
For a plunge saw I can’t recommend the Festool HK55 highly enough. You can use it as a regular circular saw, you can do plunge cuts, you can do angled cuts, and with the rails you can do perfect straight cuts. Yes it’s expensive, but they have very good guarantees and continue to supply parts. It’s also less than hiring a chippy for a couple of days. We fitted our kitchen and utility room, as well as building desks etc, and it gave a very good finish.
For a router I’m happy with our dewalt, but didn’t do as much research into that. Probably the biggest decision is what size, ¼” or ½”. It’s tempting to think ½” so you can do everything, but you end up with a massive device that is hard to use for more delicate tasks. I decided to go ¼”, and if I ever need a ½” (which is pretty much only needed for fitting worktops) then I’ll hire one.
I hope that helps