It sounds awfully like you're trying to reinvent the Beagle Pup 150!
Industry survey had identified a significant demand for a light 2/4 seat aircraft with good all-round flying and aerobatic characteristics to replace the ageing aircraft in use by flying clubs of the time, so Beagle decided to design an aircraft to meet this need. The required characteristics were for an all-metal low-wing monoplane with side-by-side seating in a wide cabin, with plenty of elbow room and easy access from each side. The new aircraft was required to possess good performance and rate of climb with faultless stability and manoeuvre characteristics and to be capable of unrestricted spinning and aerobatics within the semi-aerobatic category. It was also to have first-class ground handling and to be very reliable with ease of servicing and maintenance a high priority.
In response to these demanding criteria, Beagle designed the B.121 Pup, which first flew in 1967 with a 100 hp Rolls-Royce Continental engine as the Series 1 or Pup 100. It was soon followed by the Series 2 or Pup 150 with a 150 hp Lycoming. A small number of Series 3 or Pup 160 aircraft fitted with a 160 hp Lycoming were later built in response to an Iranian civil training requirement. A total of 173 Pups were built, 66 Pup 100s, 98 Pup 150s and 9 Pup 160s; when production ceased, a significant number of additional aircraft were still on the company’s order book.