wrt 45 minutes....all above posts are on the mark.
wrt "cheap flying"....If there's a GA -friendly airfield,or perhaps a farm-strip/ friendly landowner, you may consider a flexwing Microlight or a Self-Launching Motor Glider.
That way, you can just arrive, fly and depart.
You wouldn't get the demand on your time, helping others, the banter, the friendship, the hints, tips and help......but there you go!