Just a few basic ideas for beds ... I can’t do architecture, hopefully someone else will. You said English garden and window boxes, so I tried to create that (my app choices are very limited). The first couple are more elaborate, but things you could do over time. I know walls/walks/borders can be pricey, but I’ve had good luck in the past finding free/cheap materials on my local Craigslist and other buy/sell pages (such as Facebook Marketplace). We once got a 3-horse stock trailer full of beautiful stone, from a stone yard going out of business and wanting it all gone. :) These are just very general ideas, as I don’t know your growing conditions. I’d definitely try to find inexpensive stepping stones or pavers to have a walkway beyond your step. Click to enlarge.

@visualizemaven Thanks for your response, and those photos are gorgeous! Love the earthy/industrial vibes and the stone. We might one day add stone to the bottom half of the exterior right below the midline trim, but it's looking like it's out of our budget for now. All we have planned at the moment is paint/roof/landscape. Metal roofs are very uncommon around here, but I'll look into it. Also appreciate your thoughts on colors; I'll admit that I'm a bit color-challenged. Any ideas on what would be better?

It seems to me that the umbrella lounge area is a bit far. If the round thing with something red in it is a water feature, I'd link it better to the umbrella area. I don't think I'd push the pair of chairs so far to the corner and then barricade them with a boulder that happens to dominate the center of that space. Better to move the boulder to nearer one side. Why the white stone circle around it? would be better coming straight out of the DG.

Like Patricia, its the sea of asphalt that stops my eye. Then the jumbled plantings keep me from exploring further. The brick is not the issue, so you can save a lot of money right there. Tackle the real problems first. Have you considered taking your home in an Asian direction? Lighting could provide an interesting look for you.