With me, anyway, it's not the money; it's the technology, the history that the things bring with them.
My first restoration project was accidental and, by pure accident and stupidity, I did it right (more or less). I still have that rifle, a Navy-marked SMLE Mark I*** (built at Enfield as a I* in 1907, reworked twice in the Service to bring it up to ***) which sports one of the incredibly-rare taper-bored barrels. I have $12 invested in it so far but it is not for sale, never will be for sale. It is my "pet" rifle.
But this is a very real problem with Lee-Enfields. "Small Arms of the World" at one time listed 12 variants of Lee-Enfield rifle. At that time, a friend in Ottawa who collected just the receivers, had 31, so I sent him 2 more that he didn't have. But he showed me a couple which I have NEVER since seen. INDONESIAN Lee-Enfilds, anyone?
In the years before the Great War, the Government kept the Army so poor that they had to make maximum use of every screw. There were a great variety of very-small-production rifles, mostly upgrades, some experimentals. A FEW, such as yours, were rebuilt completely from obsolete rifles, into "new" ones. When the Great War hit, money became available in torrents, Enfield, BSA and LSA ran at capacity for 4 years, new factories (SSA, later NRF 1 & 2) were set up and even built small numbers of rifles despite the desperate shortage of machine-tools...... and the very-tiny-production rifles - such as this one - just slipped into the cracks, were surplussed as soon as the date was looked at, sold off for a couple of bucks...... and have spent the ensuing 90 years just attempting to avoid Bubba.
Your rifle likely served in some of the minor colonial wars of the late 19th Century, then in the Boer War, was rebuilt to SMLE specs, served in the Great War, was sold off as surplus...... and got cut down into the sporter you now have. At the time this one was cut down, side-grinders had not yet been invented...... so THIS ONE can be SAVED.
You won't make much MONEY doing it, but there is an immense SATISFACTION to restoring and preserving a piece of our heritage.
And THAT is a feeling which money cannot buy.
It ain't all about money.
You have had an historical TREASURE dropped into your lap.
What you do next is up to you.