Roger ... A C150 is hardly the best or the cheapest!
el_miguel42
The VP1 is fine for what you want, but very marginal in performance
There are plenty of others such as FRED's, Luton Minor's, Taylor mono's ect ect. Take a look at the PFA/LAA website, in the engineering section there is a full list of types with their "type" listed alongside. For cheapness you really would struggle to beat a VW powered single seater, but other factors do come into play. Is it deriggable/wing folding? (saves hangarage) is it sexy? (VP1's are not so are very cheap, Jodel D9's are, so tend to be expensive. Performance often relates to "sexy"). Also it is far cheaper if you can find an aircraft based on a farm strip. A two seat Jodel for example, based at a strip, will be cheaper to operate than a single seater based at most licenced airfields.
There are some great aeroplanes out there ... have fun looking!
SS