That is certainly very good work, by anyone's standard.
Ok, lets say you managed to do it in 8 full Days and the weather was good, that would be :
Travel down on sunday so you dont lose a working day travelling, come back say following thursday.
To stay in London rather than travel home at the weekend:
Travelling there : (£20)
11 nights B&B @ £15 a night (£165)
11 days food @ £20 a day (£220)
8 Days working £3,000
Travelling back (£20)
Profit £2,575 for 11 days = £234 a day
That is a very good margin, even if you lost a few days because of rain, this would still be good work.
If you didnt want to leave your wife/girlfriend for 11 days at a time you could even spread it out to perhaps 2 days a week. Or even take her with you and stay in a travel inn.
I've just had a look at your posts on the "business opp..." topic. 18k price tag is very high, but I'd say this was exceptionally good work.
Like you said, work it for a while- see if its really as good as it sounds. If it is- worth having even at that price. I'd probably have a chat with your bank manager to see if you could raise the finance. Or else see if the seller will accept installments.
I doubt if anyone could produce £18k overnight so probably hes expecting some sort of arrangement.
Ask if you can see accounts for the last few years, but dont faff around too long-that round will be snapped up in no time I think!
Silly