lets be honest combi swops arnt really a hard days work like the old days! alot easier now! ill be honest i can do a combi swop in 1/2 day if simple and spend the other half giving the system a good flush! and my pipework is nice and tidy and would be proud to but my name to any of my work, before people say im rough etc. im on about a combi out combi in pipe correct way round etc!
but boilers arnt to heavy not really a problem to wire when everything is plug and play, To be fair mate £200 is fine plus scrap in the current climate if people are sitting around, i would work for £100 a day, but thats just me and my own work ethic!!