It's already been said - no sense paying a professional to do this. If you can store it and do a lot yourself, I don't see that it's beyond hope.
In the pictures, I like the look of the sill. The bottom panel of it may be crusty, though. If that's good, it just needs the horizontal piece to fill in what's missing. This can be bent over to form the piece which holds the bolt-on sill finisher which sits under the door, or a strip can be seam welded on to achieve the same result. The crossmember and jacking point can be attended to at the same time. I cut the floor and do the crossmember from above. In fact I work it out so I do most of the welding from above, even if it means cutting off good metal to get access....it soon goes back on.
If you want to restore it to original condition, then you'd have to buy the panels. The cost of these quickly mounts up. If, like me, you are not pedantic, a piece of sheet steel 2m x 1m cost me about twenty quid, and I did a lot with it. You would need two sheets.......one just over 1mm thick, for inner wings etc, and another 1.5mm thick for chassis. This thickness is hard to bend nicely, so I build up with separate pieces of the profile, then seam weld and grind flat.
It takes time to fabricate the pieces, but I enjoy that. Cutting off the rubbish is not so nice, and sometimes dangerous.
The front inner wing? Not difficult. I've returned a picture to show how I did it. The same idea for the rear inner wings - piece by piece, with full-penetration seam welds. The curved part of the front inner wing I did in full with three pieces of sheet steel, using the natural curvature when you bend it to get the shape, and this was surprisingly easy. I bent it by pushing the pieces into place from the wheel side once all the edges had been prepared (nice and straight), tacked them into place, and cut off the overhangs as required. Then seam-welded everything up, slowly, to avoid distortion.
The rear inner wing and its connection with the outer panel? A patient job, using a bright inspection lamp behind the welds along the top to make sure you don't have any pin holes. Pin-holing in other places is not so bad, but along the top of the rear inner wing, you really need to keep water from the wheel spray from getting through and causing bubbling in the paint.
It's a big job, judging by the pictures, but I'd take it on, for myself. I've done worse, and lived to tell the tale! The rust doesn't have that 'cancerous' look of a car which has caught rusting really badly, and it's everywhere.
In the past, I have cut the following off one of my Moggie's and not lost the final shape and geometry:
All of the floor; both crossmember ends; all the sill areas except for the top and inner side of the main sill box sections, next to the door; most of the chassis running from the 'B' post to the rear spring shackles; large sections of the front and rear inner wings. I don't recommend this, but just point out it's possible. It needed a bit of careful measurement before the final strong welds were done. I keep the bonnet, both doors and the bootlid in place as a guide.
The advantage of doing a good job on something like this is that you know what you've got in the end. If you buy a Minor that looks good, you don't know what's going on out of sight in the chassis, and under paint and any underseal (ugh!....paint it, and maintain the paint!).
I've just uploaded a picture from another post in the forum to show the nice curved shape you can get from sheet steel pieces. The third piece is a smallish one, up out of sight. Where the bottom curved piece
joins the engine bay floor is in fact a 90 degree join, as per original.....it looks curved in the picture, and the join is more or less invisible - a trick of the light only.<br>

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