I think you've made the right decision re replacing the chassis. I'm almost at that point myself.
Given unlimited time and space, I'd love to re-make it myself. But, as you say, if it's supposed to be a fun project, and your welding experience is limited, better get the skills by building a trailer or similar. replacing a chassis is a fairly easy, nut and bolts project, and can be done quickly. the sooner you get her back on the road, the sooner you get the enjoyment of driving her! IMHO.