There are many who say if you can't pay cash for the plane you shouldn't buy it. That's fine, but if you think in those terms, eg how much per month will it cost me to get the money to buy this or that plane it helps. If for example it costs $200 a month to buy a much newer plane with the right electronics, paint, engine, fuel tank condition, shock disks and all the other little things sorted out, I think you would be way better off to spend the $200 and have the new plane than the one you are going to have to bring up to speed. I learned this looking at a low priced eagle with nice electronics, but the fuel tanks and paint were not so nice so I passed after a limited inspection with my mechanic.
Also, give some thought to an initial and ongoing training plan. Unless you are lucky and have someone experienced nearby either you or the instructor will need to travel.
I added my instructor into my w+b calculations figuring that I would need to take him with me on any long trip until I had the experience I needed. I was planning for 3 people total including the instructor so the mooney worked. If I had 4 plus an instructor, it would be an A36 or other 6 place single.
That was how I looked at it.