In my opinion, 90% of guitar players fail because their lack of discipline and believing in themselves. I got a solution - they should believe that it's possible to learn difficult thing like sweep pick in one week with very simple exercises step by step.
For example I took
A minor arpeggio.
Day 1 - 70 BPM
We basically teaching our fingers to get tight-in-tempo legato. Pretty simple, huh?
E--8-12-8---8-12-8---8-12-8-8-12-8-8-12-8---
Day 2 - 80 BPM
We are adding 2nd string to form some kind of sweep shape. And we're teaching our right hand to play this not-alternate-picking stuff.
E--8-12-8----8-12-8----8-12-8-------
B---------10--------10--------10----
Day 3 - 90 BPM
Adding 3rd string to form perfect 3-string sweep shape.
E--8-12-8-----------8-12-8---------8-12-8---
B---------10---------------10---10----------
G------------9----------------9-------------
DAY 4 - 120 BPM
Same thing, but muting all strings. 30 BPM faster. Just to train your right hand.
E--X---------X----------X----------X------
B------X---X------X---X------X---X--------
G--------X----------X----------X----------
Day 5 - 130 BPM
Same as day 3, but 40 BPM faster, since we already trained our muscle memory.
E--8-12-8-----------8-12-8---------8-12-8---
B---------10---------------10---10----------
G------------9----------------9-------------
Day 6 - 140 BPM
Same as day 4, but for 5-string and even faster.
E--X------------------X------------------X--
B-------X-----------X------X-----------X----
G---------X-------X----------X-------X------
D-----------X---X--------------X---X--------
A-------------X------------------X----------
Day 7 - 150 BPM
Now let's try to play full 5-string sweep.
E--8-12-8---------------8-12-8--------------------8-12-8--------------
B---------10-------------------10--------------10--------10-----------
G------------9--------------------9----------9--------------9---------
D--------------10-------------------10----10------------------10------
A-----------------12-------------------12------------------------12---