I think the BEST way to approach is work with Players. Let them know you're running street level campaign, and hopefully most will make acceptable characters using the standard rules.
I personally think it's best for most characters to take Attributes or Skills A, Just the jump from B to A, is almost 100 Karma (Varies on how you would spend it) worth of Attributes. lets Say you have Priority B. Attributes 4 4 4 4 3 3 3 3. and your planning on raising your Attributes after a series of run. It would cost you 100 Karma to get 5 5 5 5 3 3 3 3. (The same you could have gotten if you took A instead of B.) Skills same thing. The jump from C to B and B to A, is Easily 100+ Karma worth of points.
Every Shadowrun game I've played and GMed, Nuyen is way easier to come by than Karma. (Especially for Creative players) Even the one Adventure for SR5 that is out, I believe the possible rewards are in the Hundreds of thousands. I'll have to check when I get home. How often do Johnsons give Characters Gear/Cyberware/Bioware as rewards? If your using Rewards from pg 375-376 in 5th Ed. Even the simplest run is going to get each player 3k to 6k nuyen. If you do chose to use Street Scum, I'll admit the rules are much better than the Street Level play in character creation chapter.
Decks, Vehicles, Drones, Cyberlimbs can all get Bricked/Destroyed/Mangled. Then your out all that Nuyen you spent on your fancy gear. Maybe it's just me, but I like the idea of Character that succeeds based on his abilities, not on toys. I'm not saying NO one should ever take Resources High priority. I understand the arguments everyone has made, and I agree it would put off some players that really wanted to play a Rigger with a LAV. I know that for me personally and a lot of the people I play with (Not all I'll admit) taking resources at C, D or E would not deter them from playing the character class they want. They might just have to wait a little longer to get the gear those Alpha Synaptic Booster 2. Most of the Really good stuff you can't even get at character creation anyways.
I'm curious if anyone has play tested with Decker's to see how much difference Decks really make. Everything I've read, it looks like Decks don't make even close to a difference that they did in SR3. Skills, Edge, Attributes, and choosing the right programs/deck configuration trump what kind of deck you have.