ok hands up I'm an installer..
straight combi swaps start at 1150 which take a day and i clear about 350 on.
take from that my running costs of 375 a week.. ( yes it costs that much to run and buy a van insurances tools phones ( £64 for bt and 7.50 to talk mobile a month) qualifications ( renewing my ACS this week 865..)accountant, advertising 85pw gas safe hetas memberships postage stationary etc etc)
average boiler change in the last 12 months would be circa 1700, most expensive i ve done is 3875 but the boiler alone cost me 1700 plus 175 for controls 85 for magnatec and 500 quids worth of copper and fittings.. one 28mm brass compression T piece cost 32 quid..and it took 5 days.. and was a 60 mile round trip each day
normally average 5 boilers a month.. boiler sales this year industry wide are 10-12% down I ve lowered prices to the bone to take money and am level on sales quantities but down on sales value by about 15%
central heating is unsurprisingly very seasonal.. starts first week of sept ends last week of april..
this is probably the most expensive time of year to be contemplating this work and i'd delay unless its a distress purchase..
frankly messing about doing full installs and bespoke work is not work for this time of year, the season is short and i have to maximise my potential income which i cant do tied down to anything other than straight forward work as the more complex and involved the work is the more time it takes and the less viable it becomes..