From a slightly different angle:
To estimate flying costs, Double the original estimate, triple that and add a bit more. If you intend to fly (rather than fly a this, that or the other,) it may take much more time and money than you hoped. The cheapest licence that allows you to fly a light aeroplane is an NPPL(M). The light aircraft in question is a microlight. A C42 will do almost everything a Cessna 150 will do except for drink lots of fuel and climb very slowly. In many ways it is a better aircraft so there is no real advantage in spending the extra just yet if your priority is to go flying.