Get a good Russian AK-47. Might be a lil hard to order one because of the sanctions against Russia, but if you look hard enough...you find one.
They are relatively inexpensive (or were), super easy to maintain, tough and durable, ammo inexpensive/plentiful.
You can dunk this puppy in muddy water, rap it against a tree, load a mag of dirty ammo...it still fires and fires with no jamming. Effective range 450 yards.
Accuracy not as tight as AR platform, but at 100-200 yards, unless you suffer from Parkinson's...you ain't gonna miss what yewzz aim’n at.
Izhmash SGL21-61 is an awesome piece of machinery.
http://www.k-var.com/shop/SGL21-26_Series-7.62x39mm-Caliber-Russian-AK-47-Variant-Rifles/
I had a Saiga before the boating accident. Outside of the more costly magazines, it is a darn good Russian made AK variant. If one considers the magazines to be a one time purchase, that’s not a big deal.
Hint. Get only SGM / Surefire mags for a Saiga. Promags are awful. Something about the feed, non stop feed jams. The mfg was very nice, replaced 3 of them for free, same thing. I had to throw $60 in mags (plus shipping) in the garbage. Out of 6 brand new, never got one single Promag to work reliably.