Two questions are how long is your grass strip and how is it maintained?

I know this isn't your original plan, but a P-80 would be perfect in this plane and they are available in good condition used for $1800 or less. The plane would be better off of grass with the P-80, probably have a longer flight time (the P-60 is actually somewhat of a gas guzzler), and you could keep your Reaction for a fun-fly, "warm up" jet. Having something like that around with a lower emotional and monetary investment that you can keep your skills sharp on does make jet flying more fun...

Bob