You are very welcome, lots of folks have helped me on this forum and I try to keep silent on what I don't know and pass on what I have learned. It looks like you already have two worthy projects-let me know if I can help. Through trial and error, I have learned a few things about restoring old rifles. GunnyUSMC is a wealth of knowledge, especially on stock work. LoonWulf, Entropy, and Alexander A, among others etc. also know their rifles and fitting stocks to receivers etc. That is one of the main issues on restoring a sportered Lee-Enfield is fitting the stock properly.
Sorry for the long post ahead and feel free to ignore,
I have several flavors of the Lee-Enfields and have restored several--have some good sources for parts if you need any. The 1916 and the older 93 Spanish Mausers are probably one of the easier ones to get parts for right now due to Samco Global stocks being released into the wild. They are pretty straightforward to restore except stocks have been getting expensive. Biggest issue right now is a lot of the Spanish rifles available now are rode hard and put up wet as the saying goes. Rough bores are common along with worn receiver lug recesses (from the 7.62 Nato conversions and wear). It appears that Springfield Sporters will soon be up and running again and they have excellent service and the parts quality is what they say it is or better.
From a cost standpoint on a new project, my advice (YMMV) is that the easiest to restore is a plain Mauser 98 action of whatever flavor--VZ24, k98, GEW 98, FN, etc. There are still some factory new bolts for them, plenty of original and new barrels, trigger guards, etc, and you can obtain bare receivers for $50 or so. The scrubbed Yugo 98 actions usually marked Preduzece 44 often go quite cheap, and the Czech VZ actions are a bit more expensive but very well made, sometimes even the k98's of wartime vintage show up, and a variety of Mauser 98 stocks are around for not a whole lot.
The Mauser 98 also has the virtue of not requiring the barrel to be timed. Variants of the M98 such as the Springfield and 1917 Rifles with their coned breech, the P14, etc. with extractor relief, and the Yugo Mauser with its "safety ring" require barrels to be set back one thread for everything to line up. A M98 headspace can often be adjusted merely by turning back the shoulder and finish reaming. Sights are then reinstalled at the new correct barrel timing. There is also still enough interest in sporter 98's that sporting barrels, triggers, etc. are around if you lose the zeal to bring it back to military trim.
Swede 96 Mausers also have a surplus of new bolts right now on the market but the receivers are generally higher because of the perceived value in Swedish steel and workmanship. Parts are still available but climbing on some key parts. Stocks are around and relatively affordable. The older 95 actions, complete bolts have become very scarce. Of the older actions, the Argentine 91 Mauser still are relatively cheap and barrels in the original caliber are around. Difficulty in these is finding stocks. Plenty of sporterized versions around.