$4500 is going to be very limiting for a multi-purpose tractor. These things are so darned expensive it's crazy. In my opinion, for 5 acres you would want a 20 to 25 HP with a 54" to 60" mid-mount mower and a front end loader. I'm a firm believer in "buy American" but, dog-gone-it, the Japanese models are so nice. Expensive but nice. JD, Ford, New Holland, Ferguson, and many other common name brands are mostly made in China these days. I presently own a 26 HP Kubota and that little sucker was over $13k five years ago. That's outrageous.
If I were you I would be looking at older Ford, Ferguson, Case/IH, Farmall, and JD tractors with live PTO and front end loader. All of the tractors in the 20 to 30 HP range have the same design cat-1 three point hitch and rear PTO so implements are easily interchangeable.
In 1989 I bought a 1952 Harry Ferguson TO-30 and used it for 20 years. With careful upkeep the older tractors are very reliable and excellent workhorses. I sold my TO-30 in 2008 and it was like new.
Good luck.