Just my .02,
I built my first AR about 2 years ago.
I really got into it. Great fun.
Though time consuming and frustating at times.
Especially if you don't have access to "Tools".
But I did not save any money over the cost of buying one complete generic rifle.
(2,years ago yes. Now..., I don't think so)
The main thing I got was pride in a rifle that I pretty much assembled by myself and with lot's of help from people here.
The LEGP Rifle is less than I had spent to put together my Frankengun, and it comes with that all important factory warrantee. [:D]
If this is your first AR, you really should think about The LEGP Rifle.
You will get a better(Factory assembled) rifle for the same $$ and it will have re-sale value if that time ever comes.
Your home built rifle might not.
At least not as much.
Good luck either way. If you need any help,
there are many here who will give you guidance.
Peace,
Delmarksman