When a single is working they are amazing to drive and for the money, NOTHING matches it for power, speed and noise, however it is a very expensive journey and I cant say this enough, you will always have something to do and you will always spend more that you had planned to
Going single several times with different cars has aged me several years and blown any savings I may have had, my top tip would be to choose a garage that has been there and done it several times and one that will give you a car that is finished when you get the keys back and not one that just needs this and that doing to make good, which has happened all to often to members here including me in the past
Collect all the parts you need first and think about more than just the turbo kit, you need to consider the fuelling system from pumps, lines and injectors, water pump, oil pump, cooling, intercooler, cams, valve seals, cam belt, transmission, brakes, suspension and any other old moving part that will have to face the strain of the new found power
Most of all good luck