Sooo, if you're thinking C150 or 152, then for heavens sake look at Ikarus C42. MUCH cheaper to operate with similar mission profile. No hassle with having to set up an ATO for ab initio, though you might struggle to find one that's legal to rent out and an instructor who isn't already working elsewhere.
Fine if you wish to deliver training for microlight and probably just about the ugliest small aircraft in modern day production.