Concerning a rotisserie, you shouldn't need one to patch those floors, provided the floor under your seat pan is sound. If that is the case, you only need to replace the 2'x2' footwell sections in front of and behind the seat braces, which both maintains unibody rigidity and saves you from having to remove your subframe. Cut out one quadrant at a time, lay the old section in the new pan, and cut that perimeter with an extra 1/2" all around. You can weld the patch in as-is if you want to use lap joints, but I butt-welded my floors. To get the exact size, I laid the oversized patch in the floor and plunged my cutoff wheel into both the old floor and the patch panel at the same time. This left me with a cutoff wheel's width gap for butt welding, which was wider than ideal, but it still worked fine.

You should be able to get a used 110V hobby welder for not too much money. I think I paid $150 for a Hobart Handler on craigslist and spent another $150 on gear, wire, and gas. Once you have a welder, a whole new world of repair and fabrication is opened to you.

It's worth noting that those half-floor pans have the flange for the pinch weld on the wrong side. It's not a problem when you are cutting patches, but if you decide to do the entire half floor at once all the way to your rockers, it will need correcting.