Two pieces of advice for what it's worth.
1) You really should try living in Hurghada before you buy. It is such a completely different way of life and I do know English people who have tried it and regretted it. Not to say there aren't many benefits however. Egypt is a lovely country - still very safe compared to London. You also can never really know which are the best areas for you until you've lived in a place.
2) Egypt is VERY relaxed about things like registration. We had a flat for 20 years in Alexandria but never registered it and sold it with no problems 3 years ago. The real benefit of registration is if you are buying a property off an individual and need to make sure you are not being stitched up, then you go and register it straight away to ensure it's in your name and they not (for example) selling it to other people too!! However, if buying off developers its not really necessary. A lot of people don't bother. Registering land is more important. We have land too but would not consider selling it until its properly registered. But you know, with Egypt, everything is so relaxed and slightly chaotic and there's usually a way around any problem!!
We've been visiting Hurghada for years and personally could not live in Hurghada itself but would choose Sahl Hasheesh. Just because it's more upmarket and also peaceful and more beautiful. However, if you have children, you'll probably want Hurghada (or El Gouna) for the schools. Have you considered El Gouna for your home as there is a thriving English community there although it's expensive.
For rental I'd choose - a flat in Hurghada for versatility (you then have the permanent rental market + cheap holiday lets) and a flat in Sahl Hasheesh for the more upmarket holiday let where you can charge more. There are still some reasonably cheap flats available I believe in Palm Beach and Andalous. However, that combination might go over £100,000 in which case I'd stick with the Sahl Hasheesh flat and own residence.
NEVER NEVER buy anything from the U.K. - GO AND SEE IT FIRSt!! It is great that there will be so many English people owning in Hurghada and surrounding areas.
Good luck. p.s. Sorry if I have repeated other people's advice - hope it's still useful.