Have you tried Googling "topiary trimming guide" or another similar search phrase? You might run across what you are looking for that way.

Not yet - I am thinking I will get a length of aluminium angle and put that on, or else a piece of timer and then paint it with waterproof paint.

Paint your house and ceiling first. You are probably asking for trouble if you put the floors down only to paint over the top of them. If you can, remove the tiles in the kitchen and paint just behind the line of the splashback too. Once painting is done replace kitchen benchtop then splashback. I would call the bathroom its own job and do it individually, unless you only need to paint the ceiling and if a tiler doesn't need to be brought in for anything else in the house? A lot of bathrooms now are getting tiled from floor to the ceiling if this is the case, paint the ceiling first, then tile. If walls need to be painted, it wouldn't really matter if you did them first or last, though if you did it first expect to do some touch-ups. I guess if you really wanted, you could do the first coat before tiles then second after... I don't exactly like stopping and starting painting, so I would do the walls (if they needed to be done) in one hit, after its been tiled. Well that's the order in which I would do everything... Really, for what you're asking, the painting could be done at anytime, but to make life easy on yourself, I would definitely recommend doing it before the floor.

I'd get a signwriter to do a bespoke sign that doesn't look like a mass produced one , with something like 'Our main entrance is this way' or similar , say orange lettering on a 40cm square white powdercoated alloy sign , and a squiggly arrow -- or maybe get it on a varnished wooden sign or similar -- spend $50-100 rather than $10 . Fasten on that left hand front beside the garage door . Not a complete solution , but it will help if done right .