I have been registered in other businesses and this carried over to cleaning.
It has only one advantage as I see it--- You have to get your books straight every 3 months.
I always quoted an all-in price to domestics and since I deregistered I have not altered the prices, instant 17.5% payrise.
If you register you can claim the vat back on all equipment you have bought inc vans. I don't think there is a time limit. I claimed it for a van that was 6 years old, for the second time, having 'bought' it back then registering again.
If you have to register get a proper accounting program not just bookeeping.
This will do your vat return in 1/2 hour.(Not counting the entries each night when you get home- which of course you all do anyway, don't you

)
Don't forget more small businesses go belly up because of poor or non existing account systems than any other reason.
Thank goodness I'm nearly retired.
Trevor