Fitting your own kitchen is not for the faint hearted despite what some might say.
It is only 'not that hard' if you have a practical mind and are good with DIY.
In my experience, kitchen designer supplier and fitter for over 10 years, 90 % of kitchens installed by peeps with a lack of experience turn out un-level, not square and the plumbing is generally poor, compression fittings and push fit couplers are used where solder joints should be used.
Don't get me wrong I am not having a go at those who try it....on the contrary, good luck to you and fair play for doing it.
What I would say is that if you contemplate doing it yourself then get decent spirit levels, not the cheap DIY store plastic things, and a large set square.
If I were to do it then you would be looking at around £500 if it was local.
That would be with seamless routed worktop joints, not the aluminium ones that harbour dirt and bacteria, and Colourfil jointing and sealing compound.
Don't use the glue that they supply with the flat packs, it is pants and you never get enough to do the job properly.
EVO STIK waterproof wood glue is the way to go and get a small set square to make sure that the cabinets are square as you build them.... kitchens are a lot harder to install if the cabs are built out of square and can cost a great deal of time when trying to screw the units together, get them level and be able the get the doors to fit squarely.
DO NOT RUSH IT!!!!....take your time and spend the time getting everything right as a small miscalculation here can have a detrimental effect somewhere else.
As ace2109 said "the joints are probably the most expensive thing" with regards to time and if they are messed up then the whole kitchen is spoiled as messed up joints stick out like a sore thumb.
