cost me (because I did all the work except plastering the ceiling)
less than £500



forgot to mention, that was for...

5 joists
15 sq mitres T&G flooring
18 mitres mdf skirting
2 x 5 litre ronseal wood stain/varnish
6 12mm foilback plaster board
3 bags board finish plaster
18 mitres coving
? tubes of no more nails
plasterer

and other sundries that I can't remember

it worked out roughly the same (within a few quid) to lay T&G as it
would to lay chip board floor with either underlay and a quality carpet
or underlay and laminate

LJ